Do you have a good working Scope installation?
Backup the whole SFP folder it. If you have to reinstall from scratch, after installing the scope software, you will be able to overcome any problem (keys, missing files, new oxe's installed etc.)Simply replacing the new folder with the old one. Naturally in the same directory.
I do it in any case, instead of reinstalling the whole thing with plugs etc.
It's one of the simplest but most effective safety tips.