Just like that...
I understand that SW Visualize worked fine but from some times it can't open any project, yes?
If yes, let's check if SW Visualize is opening using dedicated graphic card (if you have NVidia, you can check it in te NVidia Control Panel). You can verify too if you have installed recommended graphic card driver: https://www.solidworks.com/sw/support/videocardtesting.html
Btw. the similar case is resolved here: https://forum.solidworks.com/thread/221642
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