Yes, no problem than I can see (although I haven't had time to test it much).
Last night I saw the archive was available again, downloaded it and opened it with app manager without uninstalling the previous one. It correctly went into upgrade mode and the new version seems to work okay (although it went 'poof' once when clicking on one of the buttons on the left side :-)

One minor inconvenience : it does not pick up a proxy address that may be configured in the current connection's profile, like Opera does.