How to open the new license window in old software versions?

If the newest AppService is installed on systems with older product versions, you can display the new license window through the following steps:

1. Open C:\Program Files (x86)\AppService
2. Double click LicenseUiExternal.exe
3. Open the settings (gear wheel) > choose: Show version info
   
   Now the new AppService UI is displayed, even though the installed GMG product version is older.