Im actually starting to get a problem like this myself, every time i save any map now for some reason my editor gets the trigedit message saying "something bad happened" and then crashes.
Send me your backupdb file or upload it somewhere. It normally has to do with the file being damaged, but I have not been able to get ahold of a damaged file.
SCMDraft 0.7.3 crashed on me with TrigEdit saying there was a problem (I only use the classic trigger editor) and giving me a dump file. Unfortunately it also corrupted my map and my backup archive is empty even though auto-saving and backups are turned on.
This is what's in the SCMDraft console if I try to run it and open my map:
Plugin(E:\BROOD2\Starcraft\plugins\Classic Trigedit.sdp) is incompatible with Scmdraft version
Error loading plugin (E:\BROOD2\Starcraft\plugins\Classic Trigedit.sdp)
(ENGINE) Loaded data.
Opening protected maps disabled!(E:\BROOD2\Starcraft\maps\!!!!!!dddd.scx). Compile with -IGNORE_PROTECTION option set
(ENGINE) Closed Map.
Now the game won't open my map saying it's invalid/corrupted and SCMDraft says it's protected.
Here's the dump file: http://tf.interstellarburst.com/Trigedit.dmp
Whats the size of your backup file? Also, what were you doing right before it crashed?