'm running the latest version of Perl on a win 7 pc and having one hell of a time finding a make utility that might allow me to install modules manually

ppm install dmake MinGW

http://citrusperl.com

http://strawberryperl.com/

but I now see that Tk has evolved to Tkx.

Um, no it hasn't :) Tk is still Tk

I'm curious if there's been a port of ptkdb using Tkx and if so, where might I find it?

Devel::tkdb, Devel::tcltkdb, based not on Tkx, but Tcl::Tk and Tcl (on which Tkx is currently based)

ActiveState has some Komodo or something, with a debugger, which might be based switched to Tkx by now