I am unable to access my LR5.7 Catalog of my recent holiday. I am running Windows 7 (64Bit) and recently installed and then uninstalled DxO Optics Pro. The error message says it "cannot be opened because another application already has it opened.Quit the other copy of Lightroom before trying to launch" The problem is, that I can only see one copy of LR5 open and cannot locate the ".lrcat.lock" file for the specific catalog I want to open. I have tried re-booting my computer, but this did not work.
The lock file will be alongside the catalog and previews files... what do you see there????
Thanks Geoff. I was finally able to locate the ".lrcat.lock" file relevant to the catalog I want to open. Once I deleted it, LR5 was able to access my images. Problem solved. THANK YOU