Tested new version and only thing is that icon after installation is still missing. Documentation says that "gtk-update-icon-cache /usr/share/icons/hicolor" should be run in postinst script.
Noticed also that it's not possible to use file choose dialog to open original database in '/home/user/' when I opened old database from mmc1. (And it seems that mikkov already mentioned it in this thread). And the more standard path for database is probably: '/home/user/.fuelpad/fuelpad.db' . So maybe hiding open database button is a good idea.