... and it does not continue when I click the button. If I launch the Blueprint Editor from a backup from 2018, it runs fine, as long as I run it in the same folder that the backup is contained in. When I copy it over to the new installation and try to run it, then I get the above error message.
EDIT: Ok, now this is really weird. I had changed the name the version that did not work (68.2c) to "BlueprintEditor2-Broken" so I would know the difference between it and the backup version. I clicked on it, and it opened up and ran fine. Just for S&G, I removed the "-Broken" from it, and when I tried to run it again, it failed. Then I added "-Broken" back to it, and it runs again!