I no longer have or trust the original bitcoin software that I used to use, and I do not feel like installing anything new (my skin crawls just thinking of all the complexity I'd have to come to terms with to cash-out all those coins and several-dozen wallets).
You don't need to rush to recover your Bitcoin (and it's forked coins), take it slow and don't hesitate to ask question when in doubt. If you can setup GPU mining in past, you should be able to use software used to recover your coins.
P.S. i strongly recommend you to ask about it on
Bitcoin Technical Support board.