I may be missing something obvious, but I unzipped the contents of the Transpose Master zip file from the downloads center to Zstartup>>ZPlugs, but when I restarted Zbrush, I don’t see the option. I successfully unzipped/installed Subtool Master just before trying to add Transpose Master, so I think the folder hierarchy was preserved.
I’m using Zbrush 3.5 for PC, Vista 64 bit OS. I still have Zbrush 3.1 on the computer, and I tried installing Transposer Master on it, with the same result.