Hi there, My PC crashed while I was exporting photos into Lightroom 5. I switched my PC on again and when I open the program I get this message popping out; Lightroom encountered an error when reading from its preview cache and needs to quit. Lightroom will attempt to fix this problem the next time it launches.' What that suppose to mean? I tried to restart my computer but I get this message every time I open Lightroom...after I click 'ok' the program shutdown.... Thank you!
Delete your preview cache.
In your operating system, find the folder that contains your catalog file. In that same folder is a subfolder whose name ends with Previews.LRDATA. Delete Previews.LRDATA. Do not delete anything else.