Press ctrl+i when inside TPT, this will "install" it. Or more like, register it so it knows to open the tpt at that location every time you open a ptsave link.
@The8BitPotato(View Post) No idea if this will work, but try running TPT as administrator. You might not have the permissions needed to register the program, and windows just doesn't want to tell you that.
Or well, I guess it could be, but you shouldn't need admin to register it. Maybe you just need to restart your browser or computer? I guess do the admin thing as a last resort :|, but I didn't need admin on mine.