Nach Update auf V6.1: Keine Vorschau-Bilder (.rsdoc-Thumbnails) im Windows Explorer

Hi everyone, Since updating to the new version DesignSpark Mechanical V6.1, the file preview images (thumbnails) for my saved .rsdoc files are no longer showing up in Windows Explorer. Only the standard icon is visible.   I am using Windows 11. In the previous version of DSM, the preview worked without any problems.   Is there a known fix for version 6.1 or a specific command to manually reactivate the file preview?   Thank you very much for your support!