I have been using Lowrance for 7 years with HDS. 4962 waypoints. My new 12 unit came with 6.0 version. Usr files will not upload. 2 hours on phone with tech and best they said was download .gpx and convert using babel. That does not work either. That was strange to me. Justin found a website with older version so Iinstalled 5.0 and all my .usr files load. Put 7.0 on and fish reveal looks like a lot of clutter on Barkley. .usr files do not work again. Reloaded 5.0 and .usr files work great. ftp://software.lowrance.com/ I may have a corrupt file but went back years on usr and no luck. Lot of chatter on other sites about .usr files not loading. Me thinks C-Map is coming for lowrance!