To repeat; if you're not using Windows Vista or Windows 7, you don't need to do anything at all. If you are, and have to run it as administrator every time, this little fix will do the trick.
Note that you will lose your settings and highscores (on Windows). If you want to keep your 0.6.2 data: start the new binary and quit. Then copy the files supertuxkart.cfg (for settings and key bindings) and/or highscore.data to $APPDATA/supertuxkart.