If that's not it, my thoughts go to the convertible top relay (double sized relay in the kick panel). Part of this relay controls the window drop function. First thing would be to remove this relay and reseat it into the relay panel to be sure it wasn't accidentally kicked loose.
You can check parts of the relay with a multimeter, but you said you were looking for an easy fix, so I don't know if you're comfortable doing these checks. If you are, let me know and I'll get into the procedure.
