SourceTree won't start - Unable to load MEF components

Hi, I am using SourceTree Enterprise 3.4.13.0 on Windows 10. After a Windows Update Today it does not start anymore. Only see splash screen then it closes. Tried uninstalling Reinstalling, nothing helped. In the SourceTree.log I see this error: ERROR [2023-06-14 09:23:59,047] [1] [Sourcetree.Comp…