Sorry, I used the wrong word when I said "launcher." I have word finding issues sometimes due to MS damage, which is really unfortunate in online discourse.
After I tried installing the restoration mod, the main menu was the vanilla version. There was no indication whatsoever that the restoration mod was installed. But I think I know why. I think my issue is that I didn't change the folder that TSLRCM installed in from the default in the installer. It defaulted to install in the game folder that's inside the lucasarts folder in Program Files (x86), which seemed correct to my brain, as I'm used to installing mods for non-Steam games. There is another folder for the game in the Steam folder, which is where the exe file is. I'm basically a Steam noob, and I've never used mods in a game I got from Steam. After posting for help here, I noticed someone on the TSLRCM download page here commented about the mod defaulting to install in the wrong folder as well, so that's surely my problem. It's the next thing I'll try when I have time.
Yes, that's the patch. Thank you for the information. I'll be sure to install it second. I don't plan to use M4-78EP because I played through that once before, and it wasn't my cup of tea.
Thank you very much for the help.