64ST GPS only showing 1 track

I was playing around in BaseCamp and on the GPS and screwed something up.  I leave all tracks on "show on map" because lots of ATV partial trails or different parts of the trail on different trips and I want to see everything I have ridden, no matter when.  Now only 1 single track at a time will display on the GPS.  I suspect I deleted a folder while messing around in BaseCamp.  Can anyone see a difference between mine and yours?  

As an alternative, is there a sure way to save all my tracks and data, and just re-install Base Camp without losing years of trails?

TIA