Hi Bob - also another method for looking up your license key is to go to your old PC where you have V3 installed, hold down Win key + R to get the "Run" dialog, and inside there put in:

%AppData%\Moi

That will then open up the folder where MoI stores license keys - there will be a file there named moi_v3_license.key which you can open up in notepad to view your v3 license key.

- Michael