Changing instruments on an imported midi file? 0.9.4 on Windows

I set up a soundfont (General User GS) using the Edit->Preferences dialog. When I import a midi file with multiple instruments and play it back all the parts seem to be played using the honkytonk piano patch. I can't see any way to change the instruments.

One thing I tried was the Create->Instruments option. Even though there were already instruments, the 'edit' button was disabled until I added a new random instrument. Then I deleted the new instrument and the edit button remained enabled. Using the edit button I was able to set the midi program (although I had to look up the appropriate general midi instrument number since it didn't give a list, only numbers.) However changing one instrument's midi program immediately changed all the others to the same program. I tried playing the piece anyway and it still sounded like everything was honkytonk piano.

Will there be an option to edit stave/instrument properties under the Edit menu at some point? And can't import from midi preserve the instruments given in the midi file?