MistyRadio on "How to change a link"

I'm new to this. The website was built by a company, but I'm trying to learn the easy stuff so I can maintain and update it myself.

My website is for an internet radio station and the LISTEN NOW button links to a player. I have a new player and would like to change the LISTEN NOW link so it directs from the current player to the new player. How do I change that link?

Thank you,
-Dan