diff --git a/src/libslic3r/AppConfig.cpp b/src/libslic3r/AppConfig.cpp
index a5fda9f9cb..4fd9b565b3 100644
--- a/src/libslic3r/AppConfig.cpp
+++ b/src/libslic3r/AppConfig.cpp
@@ -146,7 +146,7 @@ void AppConfig::set_defaults()
             if (was_legacy && network_version.empty()) {
                 // User had legacy mode enabled - set to legacy version number
                 BOOST_LOG_TRIVIAL(info) << "Migrating legacy_networking=true to network_plugin_version=01.10.01.01";
-                set("network_plugin_version", BAMBU_NETWORK_AGENT_VERSION_LEGACY);
+                set_network_plugin_version(BAMBU_NETWORK_AGENT_VERSION_LEGACY);
             }
             // Note: If was_legacy=false, we leave the version empty and let the GUI layer set it to the latest version
 
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index fef82357ae..7e32dab4ed 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -1522,7 +1522,10 @@ int GUI_App::install_plugin(std::string name, std::string package_name, InstallP
             config_version = BBL::get_latest_network_version();
             BOOST_LOG_TRIVIAL(info) << "[install_plugin] config_version was empty, using latest: " << config_version;
             app_config->set_network_plugin_version(config_version);
+            GUI::wxGetApp().CallAfter([this] {
+                if (app_config)
             app_config->save();
+            });
         }
         if (!config_version.empty() && boost::filesystem::exists(legacy_lib_path)) {
 #if defined(_MSC_VER) || defined(_WIN32)