Thanks Brink, unfortunately that was a pretty old version (1.0.5). I was hoping to find a more current one, at least 1.0.9 or 1.1.0.
I did some more hunting and found what is purported to be 1.1.0 on a zillion Chinese language sites. I downloaded and AV checked it and it says it's fine, but i'm wary. I don't know if it's legit sites.
I found it already installed on my old PC, but no installer. So, i wondered if it could run by itself and i've found through Google cache that the author said that it can run portably by just putting the four required files into a folder and running it (i wonder what all the other files are for?!). It's also highlighted here: The Portable Freeware Collection • View topic - Win7 Library Tool V1.10
So, i've been able to run 1.0.9 "portable" on this PC and it seems ok.
Thanks though, your post gave me the spark to look for another way