Oops! Awkward...
Sorry, Michael, you are correct. It's been on my network for so long (~10years), I forgot that I downloaded it from somewhere or other. Regrettably, it's so long now that I've no idea where. Google shows nothing relevant. The DLL is dated 6/03/2000 and the icon BMP is 1997. I also installed it at home, so this may be why I concluded (wrongly) that it was part of Pegasus.
Looks like it will be the hard way then...
[Licensed Mercury/32 user]