Sage 50 - constant "Bad Key file" - reinstalled - even upgraded to 2020 - same issue 1 week later.

SUGGESTED

This would be the 4th time a reinstall has to happen in 1 month.
Are there any other troubleshooting steps on this other than to reinstall?

No memory issues, No HD issues.

What else would cause this?

using latest Sage 50 2020 Premier CDN edition.
Windows 10 1909.

Thanks!