diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 83f7371a63..abaf23a6d6 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -1332,10 +1332,15 @@ int GUI_App::install_plugin(InstallProgressFn pro_fn, WasCancelledFn cancel_fn)
     BOOST_LOG_TRIVIAL(info) << "[install_plugin] enter";
     // get plugin folder
     auto plugin_folder = boost::filesystem::path(wxStandardPaths::Get().GetUserDataDir().ToUTF8().data()) / "plugins";
+    auto backup_folder = plugin_folder/"backup";
     if (!boost::filesystem::exists(plugin_folder)) {
         BOOST_LOG_TRIVIAL(info) << "[install_plugin] will create directory "<<plugin_folder.string();
         boost::filesystem::create_directory(plugin_folder);
     }
+    if (!boost::filesystem::exists(backup_folder)) {
+        BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(", will create directory %1%")%backup_folder.string();
+        boost::filesystem::create_directory(backup_folder);
+    }
 
     if (m_networking_cancel_update) {
         BOOST_LOG_TRIVIAL(info) << boost::format("[install_plugin]: %1%, cancelled by user")%__LINE__;
@@ -1394,6 +1399,21 @@ int GUI_App::install_plugin(InstallProgressFn pro_fn, WasCancelledFn cancel_fn)
                         if (pro_fn) {
                             pro_fn(InstallStatusNormal, 50 + i/num_entries, cancel);
                         }
+                        try {
+                            auto backup_path = boost::filesystem::path(backup_folder.string() + "/" + dest_file);
+                            if (fs::exists(backup_path))
+                                fs::remove(backup_path);
+                            std::string error_message;
+                            CopyFileResult cfr = copy_file(dest_path.string(), backup_path.string(), error_message, false);
+                            if (cfr != CopyFileResult::SUCCESS) {
+                                BOOST_LOG_TRIVIAL(error) << "Copying to backup failed(" << cfr << "): " << error_message;
+                            }
+                        }
+                        catch (const std::exception& e)
+                        {
+                            BOOST_LOG_TRIVIAL(error) << "Copying to backup failed: " << e.what();
+                            //continue
+                        }
                     }
                 }
                 catch (const std::exception& e)
@@ -1425,7 +1445,7 @@ int GUI_App::install_plugin(InstallProgressFn pro_fn, WasCancelledFn cancel_fn)
 void GUI_App::restart_networking()
 {
     BOOST_LOG_TRIVIAL(info) << __FUNCTION__<< boost::format(" enter, mainframe %1%")%mainframe;
-    on_init_network();
+    on_init_network(true);
     if(m_agent) {
         init_networking_callbacks();
         m_agent->set_on_ssdp_msg_fn(
@@ -2167,10 +2187,11 @@ bool GUI_App::on_init_inner()
     return true;
 }
 
-bool GUI_App::on_init_network()
+bool GUI_App::on_init_network(bool try_backup)
 {
     int load_agent_dll = Slic3r::NetworkAgent::initialize_network_module();
     bool create_network_agent = false;
+__retry:
     if (!load_agent_dll) {
         BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ": on_init_network, load dll ok";
         if (check_networking_version()) {
@@ -2185,6 +2206,13 @@ bool GUI_App::on_init_network()
             else
                 create_network_agent = true;
         } else {
+            if (try_backup) {
+                int result = Slic3r::NetworkAgent::unload_network_module();
+                BOOST_LOG_TRIVIAL(info) << "on_init_network, version mismatch, unload_network_module, result = " << result;
+                load_agent_dll = Slic3r::NetworkAgent::initialize_network_module(true);
+                try_backup = false;
+                goto __retry;
+            }
             BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ": on_init_network, version dismatch, need upload network module";
             if (app_config->get("installed_networking") == "1") {
                 m_networking_need_update = true;
diff --git a/src/slic3r/GUI/GUI_App.hpp b/src/slic3r/GUI/GUI_App.hpp
index 75130ad785..d88e1053fc 100644
--- a/src/slic3r/GUI/GUI_App.hpp
+++ b/src/slic3r/GUI/GUI_App.hpp
@@ -518,7 +518,7 @@ public:
 private:
     int             updating_bambu_networking();
     bool            on_init_inner();
-    bool            on_init_network();
+    bool            on_init_network(bool try_backup = false);
     void            init_networking_callbacks();
     void            init_app_config();
     //BBS set extra header for http request
diff --git a/src/slic3r/Utils/NetworkAgent.cpp b/src/slic3r/Utils/NetworkAgent.cpp
index f53dd98b86..9620df9893 100644
--- a/src/slic3r/Utils/NetworkAgent.cpp
+++ b/src/slic3r/Utils/NetworkAgent.cpp
@@ -107,12 +107,16 @@ NetworkAgent::~NetworkAgent()
     BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(", this %1%, network_agent=%2%, destroy_agent_ptr=%3%, ret %4%")%this %network_agent %destroy_agent_ptr %ret;
 }
 
-int NetworkAgent::initialize_network_module()
+int NetworkAgent::initialize_network_module(bool using_backup)
 {
     //int ret = -1;
     std::string library;
     auto plugin_folder = boost::filesystem::path(wxStandardPaths::Get().GetUserDataDir().ToUTF8().data()) / "plugins";
 
+    if (using_backup) {
+        plugin_folder = plugin_folder/"backup";
+    }
+
     //first load the library
 #if defined(_MSC_VER) || defined(_WIN32)
     library = plugin_folder.string() + "/" + std::string(BAMBU_NETWORK_LIBRARY) + ".dll";
diff --git a/src/slic3r/Utils/NetworkAgent.hpp b/src/slic3r/Utils/NetworkAgent.hpp
index 9f1deab24e..f6bc4430ba 100644
--- a/src/slic3r/Utils/NetworkAgent.hpp
+++ b/src/slic3r/Utils/NetworkAgent.hpp
@@ -75,7 +75,7 @@ class NetworkAgent
 {
 
 public:
-    static int initialize_network_module();
+    static int initialize_network_module(bool using_backup = false);
     static int unload_network_module();
 #if defined(_MSC_VER) || defined(_WIN32)
     static HMODULE get_bambu_source_entry();