Could you give us a little more information. For example, is there a .uqm directory in your home directory? ARe you trying to launch the program as a regular user or as root?
Does this happen during install or when you try to run UQM?
Seems to me like the loader should have an increased tolerance for variations on the content pack filenames.
.uqm, .zip, .uqm.zip, .uqm.bin etc. should all be acceptable, IMO. Seems to be causing too many unnecessary headaches for such an easily fixable problem.