Sorry I thought it was the fbx files that weren't working for you! I'm not home to look at my UU3d, and I have the standard version, so I don't know if this will help, but I think each diffuse texture needs its own group, and export multiple uvs needs to be checked on export.
Edit: also, don't forget the leave the texture line blank in the fpe!
MAME Cab PC: i7 4770@3.4Ghz (passmark 9945), 12GB RAM, Win 10/64, GeForce GTX645 (passmark 1898); Shiny new laptop: i7 4800MQ@2.7Ghz (passmark 8586), 16GB RAM, Win 10/64, GeForce GTX870M (passmark 3598); Old laptop: i5@2.3Ghz, 8GB RAM, Win 7/64, Intel 3000 graphics