ERROR: "Registration Info Could Not Be Saved" with ListPro for Windows
This error is fixed in ListPro 5.1 for Windows. You can download the latest version here.
When you register a ListPro trial version on Windows Vista or Windows 7, you may see:
To resolve this, right-click on your ListPro program shortcut, then choose "Run As Administrator". Enter your registration name and key again, and the program should remain registered when you run it normally.