My PC updated to Windows 10 (without my permission). I have located my image files, but when I now launch LR it is not only version 5, when I was using 6 previously, but there are no catalogs. Not sure what course of action is appropriate here. Help!
Search for lightroom.exe in the programs folder. When you update LR to a new full version (i.e. 5 to 6) the old LR version is not removed. If you did not remove LR5 yourself then it's still on your computer, and you just need to launch LR6 instead of LR5.