Just starting out, purchased Tuner Pro RT. Unzipped it and it requires a TPK file viewer. Searched everywhere but could only find viewers that came with a bunch of malware attached. Any suggestions for where I can find a clean TPK viewer I would appreciate. Thanks again-

TPK is the registration file.
Don't need to view it, just point to it on the registration screen.

Files you need are
XDF (bin editor item definition)
ADX (Data logging definition)
They are specific to your setup.