I never did any system backups so I don't see that I have a "restore" copy to use.
I often don't do upgrades (Firefox et al) for months because some times there are issues and I wait for the bugs to be worked out. Lately I have gotten brave or foolish (a while back I had FF ver 6 or 7 and they were on 11 or 13 and someone chastised me elsewhere for not having the browser up to date but I did not like some of the new features and went back to whatever ver I had) so now I trust FF and just do them.
I should not say this but since my last post this shockwave crash has not occurred. Guess I just jinxed myself saying this but maybe the ver 12 corrected things. I'll know for sure this weekend as I'll watch 2 tv shows from Europe that used to be easy to watch that in addition to email loading were cashing shockwave to crash.
Thanks for the links, I'll keep all this in mind if I need to uninstall and I'll look at that online SS course. My SS is doing what I want and I may never need to do another but it was fun, sorta.