Ok I am trying not to panic here but I just went to open up Lightroom 6 and my catalog containing over a thousand of my post processed photos is gone and in its place I have a brand new LR 6 ie; no photos, no anything! I only used it last night and nothing was unusual I haven't had a crash of any kind and everything has been sweet. I have just installed the latest update from Adobe CC but there is no change. I have always run the Lightroom catalog back up but there are thousands of files with names that make no sense to me. Do I select all and import them all back into LR? Can somebody please advise what is going on?
Please check that are you opening the correct catalog in Lightroom.
Hold down Alt key in Windows & Option Key in Mac and open the Lightroom
Select the recent catalog.
Let us know if it helps.
In Lightroom, select File->Open Recent and choose from the catalog files in that list. One of them is the one you want which contains your edits.