Did you give them examples of the suites that you used?  What version of Theme Manager are you using?

I am using the latest version. I did give some examples, but it happens with so many different suites that I don't know if it helped much. I've reinstalled the whole package several times, even redownloaded everything, but I still get this "the file type you have passed for (app name here) is not valid" message. Some of the suites I've had the problem with include PaloDuro, Silderado, Silverado, GoldenEagle, Pearlized, Attacker, Blocked Tears, FallNights, Food for Thought, FreedomFlight, etc., etc. I basically just started downloading suites to see if they'd work, and most of them haven't. Examples of the few suites that do work are Pixoffice and BP XPG. I don't know too much about creating the programs that comprise these suites, but I wonder if there's any particular thing I could look for if I open the suite to see if it's formatted correctly? Thanks!