how to remove old owner's email on SB radio?

I bought 2 radios and a touch off of ebay. The first radio came in today and works perfectly other than it doesn't show up on mysqueezebox .
I stumbled around and found out it it still registered to someone with a hotmail account. How do I remove this so it can connect to mysqueezebox?
LMS is fine just mysqueezebox.

Thanks!