Intellicad 12.0 fails to start

Just purchased a license of IntelliCAD 12.0 PE Plus, installed it and get the following error message:

"Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item."

As indicated on the download page,
"NOTICE: Some Windows User Access Control settings require users to run CMS IntelliCAD with system administrator permissions."

My user account is an admin account. I selected "run as administrator", same error. Get the same error for the application file, start menu, and the desktop shortcut.

I uninstalled anything CMS, restarted, re-downloaded, and re-installed. Same results. Is there something I am missing? Running Windows 11