Question on upgrading to 3.4.4 from 3.4.3

When upgrading from 3.4.3 to 3.4.4 can I just plug in the new flash stick and reflash or do I need to clear the ATV. Thanks!

You can upgrade to whatever newer versions come out without having to restore the AppleTV. The only added steps would be to reinstall the Smart Updater and possibly update Boxee/XBMC, Quicktime, etc.