Make "Windows, 64-bit Installer" appear before "Windows, 64-bit" (zip file)

Closes #933 (closed)

I'm not sure if this is the best way to do it, since now if there's no installer the regular 64-bit zip file won't appear either (see the if statement logic). I wasn't sure if I should do it this way, or bloat it with rewriting both rows, but if someone has a strong opinion on either method I can switch it to that.