Modern versions of Windows (10 and 11) often block software from accessing the license folder due to tightened security. Right-click the (or ISIS) shortcut on your desktop. Run as Administrator
If they differ, you need to (contact your software vendor). Modern versions of Windows (10 and 11) often
The error "Cannot find a valid license key..." means the shout went unanswered. The software searched the expected paths, the registry keys, and the network ports, and came up empty. the registry keys
Find the original license file (usually a .lxk or .key file) provided in your installation package . and the network ports