I am using v2.2 (Waxholm Atlas v3) on Windows 10 Education. I wasn't able to launch the File Builder, so I downloaded the File Builder Patch for Windows. It seems to be working ok now, but for some reason it only accepts .PNG, .JPG, or .JPEG. 

Isn't the File Builder supposed to support .Tif as well? I ask since that seems to be the main output of Nutil and the QuickNII manual makes it seem like .Tif should work.