Basecamp 4.7 list data lost, "fix" reverts back ~ 6months ~ 100 tracks lost!

Copying gps data to basecamp this afternoon, as most weekends. Basecamp locked up then threw the error approx "list data lost, fix/cancel". Cancelled a few times, rebooted Win7 PC, error msg continued, so hit "fix" Looks like I've lost all my data back to ~ Nov 2018 (Maybe ~100 tracks with plus a lot of reorganization work).  BC Database is kept on dropbox, which keeps history.  Hoping there's a graceful way to grab dropbox history, but how,which files to restore??  Here's a few screenshots of my BC database, I'm guessing "fix" grabbed .bak file(s) which were dated ~11/28/2018(my recollection) prior to hitting "fix".    PLEASE HELP!!!

4.7 folder: