diff --git a/RESOURCES/OPTIONS/app_images/app_images.sh b/RESOURCES/OPTIONS/app_images/app_images.sh
deleted file mode 100755
index 3456c90..0000000
--- a/RESOURCES/OPTIONS/app_images/app_images.sh
+++ /dev/null
@@ -1,37 +0,0 @@
-#!/bin/bash
-
-# check the parameters
-if [ $# != 2 ]; then
-  echo "usage : $0 <project_root> <image_set>"
-  exit 1
-fi
-
-project_root="$1"
-image_set="$2"
-
-# check the project root folder
-if [ ! -d "$project_root" ]; then
-  echo -e "${RED}ERROR: Cannot find the folder '$project_root' ${NC}"
-  exit 2
-fi
-
-# check the image_set folder
-image_set_folder="$OPTIONS_DIR/app_images/$image_set"
-if [ ! -d "$image_set_folder" ]; then
-  echo -e "${RED}ERROR: Cannot find the folder '$image_set_folder' ${NC}"
-  exit 3
-fi
-
-# check the target folder
-target_folder="$ROOTFS_DIR/app/resources/images"
-if [ ! -d "$target_folder" ]; then
-  echo -e "${RED}ERROR: Cannot find the target folder '$target_folder' ${NC}"
-  exit 4
-fi
-
-# copy the selected image set to the target
-/bin/cp -rf "$image_set_folder" "$target_folder"
-
-echo -e "${GREEN}SUCCESS: The '$image_set' image set has been copied to the target folder ${NC}"
-
-exit 0
diff --git a/RESOURCES/OPTIONS/app_images/set1/227.png b/RESOURCES/OPTIONS/app_images/set1/227.png
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index ab50247..0000000
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diff --git a/RESOURCES/OPTIONS/app_images/set1/support_facebook_qr.png b/RESOURCES/OPTIONS/app_images/set1/support_facebook_qr.png
deleted file mode 100644
index 49dbcb2..0000000
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diff --git a/RESOURCES/OPTIONS/app_images/set1/support_sale_qr.png b/RESOURCES/OPTIONS/app_images/set1/support_sale_qr.png
deleted file mode 100644
index 49dbcb2..0000000
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diff --git a/RESOURCES/OPTIONS/app_images/set1/support_youtube_qr.png b/RESOURCES/OPTIONS/app_images/set1/support_youtube_qr.png
deleted file mode 100644
index 49dbcb2..0000000
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diff --git a/RESOURCES/OPTIONS/boot_resource/boot_resource.sh b/RESOURCES/OPTIONS/boot_resource/boot_resource.sh
deleted file mode 100755
index e50796c..0000000
--- a/RESOURCES/OPTIONS/boot_resource/boot_resource.sh
+++ /dev/null
@@ -1,44 +0,0 @@
-#!/bin/bash
-
-# check the parameters
-if [ $# != 2 ]; then
-  echo "usage : $0 <project_root> <boot_resource>"
-  exit 1
-fi
-
-project_root="$1"
-boot_resource="$2"
-
-# check the project root folder
-if [ ! -d "$project_root" ]; then
-  echo -e "${RED}ERROR: Cannot find the folder '$project_root' ${NC}"
-  exit 2
-fi
-
-# check the selected boot resource folder
-boot_resource_folder="$OPTIONS_DIR/boot_resource/$boot_resource"
-if [ ! -d "$boot_resource_folder" ]; then
-  echo -e "${RED}ERROR: Cannot find the folder '$boot_resource_folder' ${NC}"
-  exit 3
-fi
-
-# check the selected boot resource file
-boot_resource_file="$boot_resource_folder/boot-resource"
-if [ ! -f "$boot_resource_file" ]; then
-  echo -e "${RED}ERROR: Cannot find the folder '$boot_resource_file'\nPlease use 'sudo ./process.sh' to create the 'boot_resource' file from the source folder ${NC}"
-  exit 3
-fi
-
-# check the target folder
-target_folder="$ROOTFS_DIR"
-if [ ! -d "$target_folder" ]; then
-  echo -e "${RED}ERROR: Cannot find the target folder '$target_folder' ${NC}"
-  exit 4
-fi
-
-# copy the selected boot resource to the target
-/bin/cp -f "$boot_resource_file" "$target_folder"
-
-echo -e "${GREEN}SUCCESS: The '$boot_resource' boot resource has been copied to the target folder ${NC}"
-
-exit 0
diff --git a/RESOURCES/OPTIONS/boot_resource/kangaroo/boot-resource b/RESOURCES/OPTIONS/boot_resource/kangaroo/boot-resource
deleted file mode 100644
index c89ad0a..0000000
Binary files a/RESOURCES/OPTIONS/boot_resource/kangaroo/boot-resource and /dev/null differ
diff --git a/RESOURCES/OPTIONS/boot_resource/kangaroo/source/boot-resource-src b/RESOURCES/OPTIONS/boot_resource/kangaroo/source/boot-resource-src
deleted file mode 100644
index e0c183c..0000000
Binary files a/RESOURCES/OPTIONS/boot_resource/kangaroo/source/boot-resource-src and /dev/null differ
diff --git a/RESOURCES/OPTIONS/boot_resource/kangaroo/source/bootlogo.bmp b/RESOURCES/OPTIONS/boot_resource/kangaroo/source/bootlogo.bmp
deleted file mode 100644
index c5f1190..0000000
Binary files a/RESOURCES/OPTIONS/boot_resource/kangaroo/source/bootlogo.bmp and /dev/null differ
diff --git a/RESOURCES/OPTIONS/boot_resource/kangaroo/source/bootlogo_1.bmp b/RESOURCES/OPTIONS/boot_resource/kangaroo/source/bootlogo_1.bmp
deleted file mode 100644
index c5f1190..0000000
Binary files a/RESOURCES/OPTIONS/boot_resource/kangaroo/source/bootlogo_1.bmp and /dev/null differ
diff --git a/RESOURCES/OPTIONS/boot_resource/kangaroo/source/process.sh b/RESOURCES/OPTIONS/boot_resource/kangaroo/source/process.sh
deleted file mode 100755
index 8e46cff..0000000
--- a/RESOURCES/OPTIONS/boot_resource/kangaroo/source/process.sh
+++ /dev/null
@@ -1,44 +0,0 @@
-#!/bin/bash
-
-# global definitions:
-RED='\033[0;31m'
-GREEN='\033[0;32m'
-NC='\033[0m'
-
-# check for root user
-if [[ "$EUID" -ne 0 ]]; then
-  echo -e "${RED}ERROR: This script needs to be run with superuser privileges (use sudo)${NC}"
-  exit 1
-fi
-
-# check the source file
-if [ ! -f "boot-resource-src" ]; then
-  echo -e "${RED}ERROR: Cannot find the file 'boot-resource-src' ${NC}"
-  exit 2
-fi
-
-# create a temp folder
-rm -rf temp
-mkdir temp
-
-# create a copy of the source
-rm -f boot-resource
-cp boot-resource-src boot-resource
-chmod 664 boot-resource
-
-# replace all images in the copy of the source
-mount -t vfat boot-resource "$PWD/temp" -o rw
-/bin/cp -f *.bmp "$PWD/temp"
-sync
-sync
-sync
-umount "$PWD/temp"
-rm -rf "$PWD/temp"
-
-# setup the result boot-resource
-rm -f ../boot-resource
-mv boot-resource ../boot-resource
-
-echo -e "${GREEN}DONE!${NC}"
-
-exit 0
diff --git a/RESOURCES/OPTIONS/camera/3d-visualizer/camera.zip b/RESOURCES/OPTIONS/camera/3d-visualizer/camera.zip
deleted file mode 100644
index e3b8f2b..0000000
Binary files a/RESOURCES/OPTIONS/camera/3d-visualizer/camera.zip and /dev/null differ
diff --git a/RESOURCES/OPTIONS/camera/camera.sh b/RESOURCES/OPTIONS/camera/camera.sh
deleted file mode 100755
index 4ef3068..0000000
--- a/RESOURCES/OPTIONS/camera/camera.sh
+++ /dev/null
@@ -1,103 +0,0 @@
-#!/bin/bash
-
-# check the parameters
-if [ $# != 2 ]; then
-  echo "usage : $0 <project_root> <webcam_package>"
-  exit 1
-fi
-
-project_root="$1"
-webcam_package="$2"
-
-package_name="${webcam_package%.*}"
-package_action="${webcam_package##*.}"
-
-auto_start="N"
-if [ "$package_action" == "run" ]; then
-  auto_start="Y"
-fi
-
-check_tools "unzip app_version.sh app_model.sh dd printf"
-
-# check the project root folder
-if [ ! -d "$project_root" ]; then
-  echo -e "${RED}ERROR: Cannot find the folder '$project_root' ${NC}"
-  exit 3
-fi
-
-# check the webcam package folder
-webcam_package_folder="$OPTIONS_DIR/camera/$package_name"
-if [ ! -d "$webcam_package_folder" ]; then
-  echo -e "${RED}ERROR: Cannot find the folder '$webcam_package_folder' ${NC}"
-  exit 4
-fi
-
-# check the webcam package file
-webcam_package_file="${webcam_package_folder}/camera.zip"
-if [ ! -f "$webcam_package_file" ]; then
-  echo -e "${RED}ERROR: Cannot find the file '$webcam_package_file' ${NC}"
-  exit 5
-fi
-
-# check the target folder
-target_folder="$ROOTFS_DIR"
-if [ ! -d "$target_folder" ]; then
-  echo -e "${RED}ERROR: Cannot find the target folder '$target_folder' ${NC}"
-  exit 6
-fi
-
-# enable the selected webcam package
-current_folder="$PWD"
-cd "$target_folder" || exit 7
-unzip -oqq "$webcam_package_file"
-cd "$current_folder" || exit 8
-
-if [ "$auto_start" == "N" ]; then
-  # auto start not requested, remove the auto start
-  rm -f "$ROOTFS_DIR/opt/etc/init.d/S55camera"
-fi
-
-# try to find out the app version (like app_ver="309")
-def_target="$ROOTFS_DIR/app/app"
-app_ver=$("$app_version_tool" "$def_target")
-if [ $? != 0 ]; then
-  echo -e "${RED}ERROR: Cannot find the app version ${NC}"
-  exit 9
-fi
-
-# try to find out the model
-app_model=$("$app_model_tool" "$def_target")
-if [ $? != 0 ]; then
-  echo -e "${RED}ERROR: Cannot find the app model ${NC}"
-  exit 10
-fi
-
-# patch the app based on the model and the version
-
-if [ "$app_ver" == "3.0.9" ]; then
-
-  # stop the app for looking for inserted webcam
-  sed -i 's/video4linux/videoXlinux/g' "$def_target"
-  if [ "$app_model" == "K2Pro" ]; then
-    # stop the app to log the message 'cannot open video'
-    printf "\x00\xf0\x20\xe3" | dd of="$def_target" bs=1 seek=2339112 conv=notrunc
-    echo -e "${GREEN}SUCCESS: The 'app' has been patched to support the webcam package (K2Pro) ${NC}"
-    exit 0
-  fi
-  if [ "$app_model" == "K2Plus" ]; then
-    # stop the app to log the message 'cannot open video'
-    printf "\x00\xf0\x20\xe3" | dd of="$def_target" bs=1 seek=2339152 conv=notrunc
-    echo -e "${GREEN}SUCCESS: The 'app' has been patched to support the webcam package (K2Plus) ${NC}"
-    exit 0
-  fi
-  if [ "$app_model" == "K2Max" ]; then
-    # stop the app to log the message 'cannot open video'
-    printf "\x00\xf0\x20\xe3" | dd of="$def_target" bs=1 seek=2339152 conv=notrunc
-    echo -e "${GREEN}SUCCESS: The 'app' has been patched to support the webcam package (K2Max) ${NC}"
-    exit 0
-  fi
-fi
-
-echo -e "${RED}ERROR: Unsupported model and version! It requires K2Pro/K2Plus/K2Max with version 3.0.9+ ${NC}"
-
-exit 11
diff --git a/RESOURCES/OPTIONS/camera/default/camera.zip b/RESOURCES/OPTIONS/camera/default/camera.zip
deleted file mode 100644
index 8ab90be..0000000
Binary files a/RESOURCES/OPTIONS/camera/default/camera.zip and /dev/null differ
diff --git a/RESOURCES/OPTIONS/fswebcam/default/fswebcam.zip b/RESOURCES/OPTIONS/fswebcam/default/fswebcam.zip
deleted file mode 100644
index 421e03f..0000000
Binary files a/RESOURCES/OPTIONS/fswebcam/default/fswebcam.zip and /dev/null differ
diff --git a/RESOURCES/OPTIONS/fswebcam/fswebcam.sh b/RESOURCES/OPTIONS/fswebcam/fswebcam.sh
deleted file mode 100755
index a92dc99..0000000
--- a/RESOURCES/OPTIONS/fswebcam/fswebcam.sh
+++ /dev/null
@@ -1,51 +0,0 @@
-#!/bin/bash
-
-# check the parameters
-if [ $# != 2 ]; then
-  echo "usage : $0 <project_root> <fswebcam_package>"
-  exit 1
-fi
-
-project_root="$1"
-fswebcam_package="$2"
-
-check_tools "unzip sed"
-
-# check the project root folder
-if [ ! -d "$project_root" ]; then
-  echo -e "${RED}ERROR: Cannot find the folder '$project_root' ${NC}"
-  exit 3
-fi
-
-# check the fswebcam package folder
-fswebcam_package_folder="${OPTIONS_DIR}/fswebcam/${fswebcam_package}"
-if [ ! -d "$fswebcam_package_folder" ]; then
-  echo -e "${RED}ERROR: Cannot find the folder '$fswebcam_package_folder' ${NC}"
-  exit 4
-fi
-
-# check the fswebcam package file
-fswebcam_package_file="${fswebcam_package_folder}/fswebcam.zip"
-if [ ! -f "$fswebcam_package_file" ]; then
-  echo -e "${RED}ERROR: Cannot find the file '$fswebcam_package_file' ${NC}"
-  exit 5
-fi
-
-# check the target folder
-target_folder="$ROOTFS_DIR"
-if [ ! -d "$target_folder" ]; then
-  echo -e "${RED}ERROR: Cannot find the target folder '$target_folder' ${NC}"
-  exit 6
-fi
-
-# enable the selected fswebcam package
-current_folder="$PWD"
-cd "$target_folder" || exit 7
-unzip -oqq "$fswebcam_package_file"
-# extend the PATH to $project_root/unpacked/squashfs-root/etc/profile
-sed -i 's#export PATH="/usr/sbin:/usr/bin:/sbin:/bin"#export PATH="/usr/sbin:/usr/bin:/sbin:/bin:/opt/sbin:/opt/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin"#' "$project_root/unpacked/squashfs-root/etc/profile"
-cd "$current_folder" || exit 8
-
-echo -e "${GREEN}SUCCESS: The '$fswebcam_package' fswebcam package has been enabled ${NC}"
-
-exit 0
diff --git a/options.cfg b/options.cfg
index 7ad5a60..20acdb7 100644
--- a/options.cfg
+++ b/options.cfg
@@ -16,13 +16,13 @@
 # Use 'openssl genrsa -out swupdate_private.pem' to generate a private key
 # Use 'openssl rsa -in swupdate_private.pem -out swupdate_public.pem -outform PEM -pubout' to export the public key
 # Place both keys (swupdate_private.pem and swupdate_public.pem) in the folder RESOURCES/KEYS
-# Available for all firmware versions
+# Available for all firmware versions (recommended)
 custom_update="@/RESOURCES/KEYS/swupdate_public.pem"
 
 # Enable root access by providing a custom root password hash (default password 'toor')
 # Providing an empty string will allow root access without a password (not recommended)
 # If disabled, you will have no root access until you find out what is the AC original root password
-# Available for all firmware versions
+# Available for all firmware versions (recommended)
 root_access="$1$///xTLYF$krWXTe62/dm.crd6CH4HW0"
 
 # Enable the UART at boot for access the uboot shell and for root login
@@ -37,13 +37,13 @@ uart="2.3.9"
 # Available for all firmware versions
 opkg="default"
 
-# Enable the SSH server, use 'dropbear' type ssh (recommended)
-# Available for all firmware versions
+# Enable the SSH server, use 'dropbear' type ssh
+# Available for all firmware versions (recommended)
 ssh="dropbear"
 
 # Set the authorized keys file for the ssh remote access with keys (instead of a password)
 # Provide the file with your public key(s). You must have the private key set in your ssh client
-# Available for all firmware versions
+# Available for all firmware versions (recommended)
 # authorized_keys="@/RESOURCES/KEYS/authorized_keys" [ssh]
 
 # Enable custom web server
@@ -53,7 +53,7 @@ ssh="dropbear"
 # More web pages will be added soon
 # Depends on the option "app_nocamera" only for versions 3.0.5+
 # No dependency for versions below 3.0.5
-# Available for versions 2.3.9 ... 3.0.9
+# Available for versions 2.3.9 ... 3.1.0 (recommended)
 # webserver="webfs-v5:8000" [app_nocamera]
 
 # Enable Python 3 (+14MB to the update, +25MB to the rootfs)
@@ -61,47 +61,27 @@ ssh="dropbear"
 # Available for all firmware versions
 # python="3.11"
 
-# Webcam cli tool for taking pictures from a connected USB web camera
-# Available for all firmware versions (not recommended)
-# fswebcam="default"
-
-# Enable custom web camera support (not recommended)
-# You can use the (1) 'default' or  (2) 'default.run' package.
-# You can also use '3d-visualizer' or '3d-visualizer.run' package.
-# '3d-visualizer' in addition to the 'default' package has a
-# 3D auto bed leveling mesh visualizer web page available at
-# http://your_printer_address:8000/mesh
-#
-# Support for firmware ver 3.0.9+ only
-#
-# 1. Use "default" to just install the package but not to run the process
-# When you need remote video monitoring from the ssh shell execute
-# 'camera.py' to start the webserver and use CTRL-C to stop the webserver
-#
-# 2. Use "default.run" for install the package and auto run the process at startup
-#
-# From your browser navigate to: http://your_printer_address:8000
-# It requires a compatible USB camera to be inserted in any of the USB slots
-# It requires the options: [python], [fswebcam] and [ssh]
-#camera="3d-visualizer.run" [python] [fswebcam] [ssh]
-
 # Change the banner to a custom one. (Recommended when using custom firmware)
 # Available for all firmware versions
 banner="banner"
 
-# Enable the web interface Kobra Unleashed
+# Redirect the MQTT communication
+# This option will disable the use of the original AC cloud service
+# and the mobile app will stop working
+# Can be used when a custom cloud service is needed.
+# Example of a custom cloud service with web interface is Kobra Unleashed
 # More information: https://github.com/anjomro/kobra-unleashed
 # Replace the URL below with the URL of your MQTT server
 # You also need to transfer to the printer your keys in
 # the /user folder by ssh as explained in the project page
 # Always keep a copy of the original keys in case you want to go back to AC cloud
-# Available for all firmware versions (recommended)
+# Available for all firmware versions
 modify_mqtt="localhost.mr-a.de"
 # localhost.mr-a.de will just redirect the MQTT to the localhost 127.0.0.1 to be used with a local MQTT server
 
 # Delete the Bluetooth support because it's not used by Kobra Unleashed
 # and can't be used since we replace mqtt anyways
-# Available for versions 3.0.5+ (recommended)
+# Available for versions 3.0.5+
 bluetooth="default"
 
 # Patch the app to check the captive portal URLs less often (originally every 2s)
@@ -120,28 +100,9 @@ app_net_ready="30s"
 app_dns="208.67.222.222|1.1.1.1"
 
 # Patch the app to stop supporting webcams. This allows a custom camera support
-# Available for versions 3.0.5+ (recommended)
+# Available for versions 3.0.5+ (recommended if webcam is used)
 # app_nocamera="default"
 
-# Replace some of the app images
-# Use it for one or more sets: app_images="set1" "set2" "set3"
-# Available for all firmware versions
-# DO NOT USE!!!!!!!!
-#app_images="set1"
-# DO NOT USE!!!!!!!!
-
-# Replace the boot logo
-# Please do not use it until further investigation of the purpose of
-# the file 'magic.bin' to the UART availability during booting
-# DO NOT USE!!!!!!!!
-# Because changing the boot logo will break many things and uart.
-# We need to investigate it further.
-# DO NOT USE!!!!!!!!
-#boot_resource="kangaroo"
-# DO NOT USE!!!!!!!!
-# If you enable this you only have yourself to blame. You have been warned.
-# Don't enable this until we know how to fix this issue.
-
 # Add a script for custom initializations at startup
 # like starting a custom MQTT server, webcam steaming, etc.
 # Place startup scripts inside this script.