HereForTheBeer: -snip-
Go into your library here on the website, and select the game in question (Torment in this case)
Just to the right of the blue TRY GOG GALAXY button, select the MORE button
In the pull-down menu select the CLASSIC INSTALLERS option and download those files.
Apologies if I'm repeating something you already know about.
Cybersquirt: Thanks again! You're not repeating, I still don't see it. I guess I gotta uninstall it again?
Selecting
Settings in the Library view send me to the TToN options, installed thru Galaxy.
Let's start from scratch. Access your Library from the website, not from Galaxy. Choose either of those two games (TW3 or T:ToN) and click the MORE tab. From there you should see the CLASSIC INSTALLERS option. This is where you can get the installers that DON'T come pre-loaded with Galaxy. Pic attached.
Normally, the installers that DO have Galaxy pre-loaded will have a checkbox (going by what others have said) found when you click the Options button in the lower left corner of the setup program. I think it's pre-checked to install Galaxy by default, so you uncheck that box to NOT install Galaxy. This is in the event that you downloaded an installer with Galaxy pre-loaded; that checkbox won't be there if you downloaded the "Classic" installer found under the MORE tab as I describe in the previous paragraph.
In a nutshell, they offer two different installers: those with Galaxy, which is the case more often in newer titles, and the "Classic" installers that do not have the Galaxy bits included. But even with the Galaxy installers you should be able to opt out of installing it so long as you remember to uncheck that box under Options while you're installing the game. It sounds confusing, with the irony being that Galaxy is the default option because it's supposed to make life easier. And maybe it does make life easier for many folks, but if you don't want Galaxy then you need to be on your toes every time you download and install a game.
Anyway, once you get the Classic installers from your website library, you can reinstall the games. This is like killing an ant with a sledgehammer but it will get the job done and should leave you with shortcuts to launch the games directly without starting Galaxy; at that point, you can uninstall Galaxy. The other way is to make your own shortcuts to the .exe for those two games, uninstall Galaxy, and then run the games from the shortcuts you made.
Hopefully I didn't screw up any of the Galaxy-related details there. I don't use it myself so I'm going off what others describe.