If you're using the new MAT file in the 3d Universe - UTC folder and it's not working correctly...first, shut down Poser. Sometimes you get weird errors that are fixed if you re-start Poser.

Try running the V2 body texture through the UTC again. Make sure you convert it as a body texture. And make sure all the body parts you want the clothing to cover are checked when the MAT menu comes up.

Then try applying the new texture to V3 using the new MAT file in the "3d Universe - UTC" folder.