So, I got it working on Windows 7. I used this tool -
http://www.technipages.com/download-orc ... ditor.html to edit the msi file and prevent it from checking the OS version. What you need to do is to run the installer once, then go to this location c:\users\"username"\app data\local\temp and find the tvitty folder (sort the folder by date and look for the newest one), then use Orca to edit the tvitty.msi file. Once you do that, it'll install on Win 7 just fine.