Process choices greyed out

I have what I hope is a pretty basic question - I just exported a multi-track project from FCP into STP, with the intent of reducing noise. The sequence arrived just fine, and I can select clips. It seems I can use any of the functions in the Edit menu on a selected clip, but I cannot use anything in the Process menu, which is where the Reduce Noise and Set Noise Print tools live.

Is there something I have to do first before I can use the Process tools on a clip in STP? I did this before with a single track project and didn't have any trouble with it.

I'm on Final Cut Studio 1 Academic. I am just starting to try using STP.

Jamie