[Fisneaky]

Check in MODS folder for "Summer" and "desert" folders for these AC and that you have the 4 default skins -

skin1o.tga - skin1p.tga - skin1g.tga - skin1o.tgb

could also check air.ini gives "Summer" and "Desert" as last entry for AC

I'm not familiar with UP ; only mods I have are original manual installs or HSFX.

Can you load regular Hurri skins once selected?