I did an uneventful catalog backup from a Windows 7 desktop, storing on a new external hard drive and wanting to restore the catalog onto PSE 2018 on a Windows 10 desktop. In the backup, the image files are there with the usual .jsor and .xmp files etc. There is a .buc file and two cache files (see attached) but no .tly file. The restored files therefore have not loaded in spite of repeating the whole thing three times.
I don't remember this problem before and would be grateful for help.
There can't be a restore without a .tly file. There are many reports about missing tly files which are the very last ones to be written in the backup folder. That means that the backup was not complete. I always recommend to be patient and to wait a little at the end of the backup process, even after you get the message that the backup is finished. Since the only real proof that the backup is good is if it has been correctly restored, the best second way is to check if the .tly file is present.