O M G... I screwed up!!! Because my Launcher kept crashing, I decided to delete and reinstall the whole game. But, somehow, I neglected to save my saves folder! I could have sworn I'd moved it somewhere. My legacy family is gone! And, I hadn't uploaded my Simself to the Exchange. If I hadn't randomly backed up one of the earliest saves from the legacy family game to a random folder than I wouldn't even have that. I'll keep looking to see if the Saves folder did end up somewhere on my system, but for now it looks like I lost everyone and everything I've built since January. *sigh*
EDIT: Well, found some later saves. Have about half the family. Though, to be honest, not really sure that I want to raise them again. I may just use some cheats to age them up and add their final traits.