This just happened to me as well. First (and last) time TT user. Bought the software at Costco then downloaded it to the desktop. Spent hours and hours inputting data in March. Took a break and reopened app today after 2 month hiatus. App required critical upgrade which I did. Then couldn't find my return in progress. Searched entire drive including Recycle Bin, Over Drive account, and admin user accounting, following all advice in this thread. Still nothing. I can't believe what horrible software this is to delete my entire file, I am despondent.
