jerm, i updated to the 2.4+ cvs earlier, its just a matter of deleting the old folder and making a new one with the same name and transferring the contents of the archive ...
Transfer your old config.xml if you've changed it heavily,. plus theres a few new additions in there not in your old one, that you can manually enter [eg theres an LED color, by default your led will be off if you dont copy the line over and change the value]
Probably also want the contents of your thumbs folder if you use those...