Did you update recently to the latest windows 10 major update ? I had a similar issue at my first attempt to upgrade, all wpf applications (not specifically simdeck) would simply crash when trying to show the UI. I did a rollback at this time. A few weeks later I've successfully updated, but after several nvidia drivers update Could you try to update your nvidia drivers ? It looks like this windows version had big graphical drivers issues. I even had to use DDU a few days ago to update to the latest nvidia drivers as none of the control panels would work and installer fail : https://www.guru3d.com/files-details/display-driver-uninstaller-download.html