First, formatting erases all user-added content but does not affect the firmware, so while you will have to re-load all your music, the player should still operate OK; there was won’t be any music on it to play except for the FM radio.
If however, for some reason it doesn’t you can always re-load the firmwware per the manual installation directions in this post.
Secondly, this the the Clip Zip board. If you have any further problems or questions, you’ll probably want to post in the Clip+ board instead. 
