Windows specific: Only start the 3rd party updater application

if enabled in PrusaSlicer preferences.

src/slic3r/GUI/GUI_App.cpp

@@ -779,8 +779,8 @@ void GUI_App::post_init()
                 show_send_system_info_dialog_if_needed();
             }
         #ifdef _WIN32
-            // Run external updater on Windows.
-            if (! run_updater_win())
+            // Run external updater on Windows if version check is enabled.
+            if (this->preset_updater->version_check_enabled() && ! run_updater_win())
                 // "prusaslicer-updater.exe" was not started, run our own update check.
         #endif // _WIN32
                 this->preset_updater->slic3r_update_notify();

src/slic3r/Utils/PresetUpdater.cpp

@@ -954,4 +954,9 @@ void PresetUpdater::on_update_notification_confirm()
 	}	
 }
 
+bool PresetUpdater::version_check_enabled() const
+{
+	return p->enabled_version_check;
+}
+
 }

src/slic3r/Utils/PresetUpdater.hpp

@@ -57,6 +57,9 @@ public:
 	bool install_bundles_rsrc(std::vector<std::string> bundles, bool snapshot = true) const;
 
 	void on_update_notification_confirm();
+
+	bool version_check_enabled() const;
+
 private:
 	struct priv;
 	std::unique_ptr<priv> p;