Question for Wadia 861 owners

I just got a used 861. It's two years old, but the guy I bought it from has had it upgraded so that it is equivalent to current factory-new models. You are supposed to be able to change the processing algorithm through the remote, but there is nothing in the manual about how to do that (maybe because the manual is 2 years old too). I asked the previous owner but he didn't know because he really hadn't used the player since it was upgraded. I could contact Wadia, but based on what I've read here and on AA, their customer service is, shall we say, slow. Anybody know what I need to do? Do I need a new remote? Thanks in advance.