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Try renaming your AVI folder to AVI_Back, that will help with random crashes.
As for the November crashes, I suspect it is the USA election bug, a fix for which is listed in the Bug forum sticky thread "Do it yourself bug fixes" Look for posts by me and you should find it.
Sounds like the new install created a new one for you. Yes there should be NO folder named AVI only AVI_old or AVI_back, whatever as long as it is not AVI.