I'm running the 2020 SP0 installer a second time to add an MBD serial number. Eventually the installer tells me that "...The source folder is not version properly. If you copied the folder manually you may have forgotten to copy the swdata99.id or swdata1.id files ...".

I had nothing 'manually', I had simply used the self-extracting .EXE.

Now I cannot complete the installer to add that new serial number.

Any ideas?

Do I need to uninstall completely and reinstall?