NIX (NIX)

I am beyond irate and on the verge of a mental breakdown, I have been on the dev build for about 1 month, upgraded 2/26, and everything was fine until today. Suddenly now I keep crashing every 5 to 10 minutes, and I have no idea why! I don't even have time to browse the settings before it crashes again, and I can't work like this! I had absolutely NO IDEA that dev channel was separated from the other 2, and I cannot, ABSOLUTELY 100% CAN N E V E R do a clean install of the OS. I CAN'T. I have all my company licenses to our cad programs on this pc, and if I clean reinstall, I LOSE them, and my company literally has to pay hundreds if not thousands of dollars for 6 new licenses for me. I don't understand why randomly my build is crashing, but if I had known, if A WARNING WAS INCLUDED, LITERALLY ANYWHERE IN THE DESCRIPTION OF THE DEV CHANNEL, THAT YOU COULDN'T JUST DOWNGRADE WITHOUT A CLEAN INSTALL, I N E V E R WOULD HAVE EVEN CONSIDERED IT! I am in an absolute panic and don't know what to do. I can't afford to reimburse my company for new licenses, and I can't afford to not be able to work. I'm gonna lose my job and my apartment if I can't find some way to save this PC. And I can't just "back up" 48 Terabytes of renders and drawings, I don't have even close to that amount of external storage. God... Is there nothing I can do? Am I just going to have to lose everything?