Mission editor missing pain schemes for su-27

[FubarBundy]

I installed the 3go model for the Su-27. To begin with all was well but at some point, the drop down for Su-27 paintschemes has become greyed out. Also, Ukranian Su-27's now show as Russian ones without decals. Does anybody have any idea of how to fix this?. Reverting the changes from the 3GO model hasn't helped .