It looks like the data is gone but I was able to retrieve some of it by going to AppData/Roaming/Eagle.
I'll have to reconnect all the parts in my schematic after I setup these libraries again.
@Anonymous.... please, finish the managed libraries feature. It has a lot of potential to be awesome, but it's very half baked right now and prone to an incredible amount of frustration by being available too soon.
I'd love to see this feature more developed in the future