A working folder completely vanished from my SDL Trados 2019 files does anyone have any clue on what happens? I have used this for 2 years now first time ever...

I have been working on a file for the past 2 days and today when I opened up SDL to work on it again, the folder with the files has completely vanished! I have a huge job to complete tomorrow evening. A bit worried.

And this is the second time it happens.  I have downloaded a file and started working and saving of course as I was going along.  It is a large 26K transaltion in 300+files.

Yesterday it worked fine I closed SDL and opened up and continued working.  My computer crashed today and when rebooting the computer it had vanished. 

I have done this for 2 years and never had this happed before to me. Does anyone have any clue on what to do in this case?

Thank you, 

Best regards, 
Barbro Andersson