Have been using LR5 regularly on CC for months. However, recently wasn't showing up in my list of installed apps in CC so downloaded it. Now when I try to open LR5 it says "Configuration Error" "error 1". "uninstall and then re-install" but when I go to the Apps list in the CC pull-down, it says "uninstall unavailable." Caught between a rock and hard place, it seems.