Is it possible that the RAM settings of CT are somehow reset during the updates?
My settings of the Mac have been reset somehow from 8192 down to 1024 MB. Somehow disturbing, as CT became unable to save a 11 MB (not so huge, IMHO) mqxliff file, a thing that has been unnoticed for a while. 2000 unsaved words, and after reopening the same file lots of glitches with the TM (as the text contains lots of tags).
It should not reset during updates.