Trados 2019 doesn't launch

Hello,

I closed Trados because it was often freezing but after that it didn't launch anymore.

I get the error: the requested data file could not be located.

I can see that in loader page, Trados stops working at the stage "loading application window"

Please help me asap with this as I have already lost the last 3 hours trying to find a solution and I have big important projects to deliver to clients in there.

Thanks in advance!

Best regards,

Sandra