Why does tb 90+ crash all the time in Windows 10 (meaning open TB, 1 minute later crashed) I reverting to 78 cured the issue instantly I had installed 78 initially - then automated updates occurred and crashing started. Then the latest few upgrades in October resulted in continuous crashing - almost immediately after opening. For days I couldn't write messages. Receiving often ok because the messages came in fast enough. I used my Android phone in duplicate. I finally went back to 78.x (the last one) and with the very helpful comments about how to use -p opened the profile with my 20 years of emails and 4 accounts successfully but no address book which is a nuisance (I will follow those instructions in due course). No crash in 2 days. So, what is doing this in the 90+ revisions. I have a i7/much RAM, desktop. Thanks for any help getting the 91+ revisions to work .