TradosStudio2024CU2_18.0.2.3255 does not start up

Trados does not load, I have tried repair, uninstall, clean install, reinstall, restarting my computer, returning the licence, resetting the licence. The screen disappears when it tries to load user settings. As if it never started up. I have windows 11 latest version. I have tried to contact the company but there no longer seems to be an option to ask direct questions except this forum. 

Any thoughts? It is very annoying not knowing why this issue suddenly occurred. This is a critical tool for me. 

Thanks for your help

Petra

emoji