Update 6.5.1 has fixed the missing lens profile but now after importing and editing photos they no longer appear in the library when I next open the program. I have to re-import from the file location, all edits are lost its not a missing folder that is greyed out?
No, just the last import - all the other photos are in place. Doing nothing different than I have for the last 5 years, and its happened several times now. 6.5.1 seems to want to back up the library very regularly, could that be it?
Sorry for the delay replying - a personal emergency cropped up.
Go to Catalog Settings and check the location of the open catalog. Then go to Preferences > General tab and check which catalog is set to open by default. I wonder if it's simply opening the wrong catalog.