Right, but even after I restarted, the following files stuck around:
/usr/local/share/isomaster
/usr/local/share/isomaster/icons/isomaster.png
/usr/local/share/applications/isomaster.desktop
/usr/local/bin/isomaster
/usr/local/tce.installed/isomaster
Again, this is after marking for deleting in the app browser, and then rebooting. I'm savvy enough to be able to rm -rf all of 'em, but others might not be (and rm -rf might not even be the best way to go about it...), so I figured I'd mention it here.