I can only imagine... Please report back & let us know.  Good luck.

Do you have good backups?

If not, use file explorer & copy/paste ALL of the .idata, cdata, sdata, rdata, pdata, fdata folder to a safe place.  I do that as a routine "backup" daily, and I name that file by the date (i.e 3.28.20)  I have such folders dated pretty much every single day of tax season.   NOT that I have OCDC or anything <w>.

Might as well do the options19, and setup19 folders too.   

JUST in case - .....  then I can walk you thru how to access your files from those if necessary.