alcaray: I have a slightly different problem (could be stupidity on my part - you be the judge). I don't know how to get to this launcher you guys are talking about.
I am not a Galaxy user, so I use the downloaded offline file to install. It was billed as a mod (and it said you had to have MOM as a requirement) so I assumed it would mod MOM. So, without any other instructions, I moved the downloaded exe to my mom directory and executed it. It did not create any shortcuts that I can find. My MOM shortcut (created during MOM installation) is unaffected and just launches the old MOM. I looked through the directory that your com exe created but I don't see anything that tells me what to do exactly (this is where my stupidity might come into play). I suppose I could try launching DOSBOX and mounting the exe into it. But you guys are talking about a launcher and that raises the possibility that the launcher is required for it to work. So I decided to stop fiddling with it and seek some procedures.
So what am I supposed to do?
I just tried downloading and installing the (new) base game. It isn't directly a mod; install it as a program. After installing, just run the exe (I used the desktop shortcut that the installer created) and a window pops up asking which version you want to run; check the screenshot I took.
I haven't purchased the CoM dlc, but I'd assume you point its installer or whatever at the new base game and let it run. Then you should be able to pick CoM from the pop-up window when running the base game.
alcaray: The only MOM shortcut on my desktop is the old one. It launches the old mom and not a launcher. Does the shortcut you refer to have a different icon from the old one?
There is no launcher.exe but suspiciously, there is a launcher.exe.config. Also suspiciously there is an install.exe file - ahh but I see there's also an install.exe file in the old mom directory. Also suspiciously, there's an html file. I guess I will fiddle with that next.
-edit- no joy. That is just some doc on the mod.
I used the GOG downloader to pull it, and when I open up the folder I get the files in the attached screenshot. I ran the highlighted file to install the new version (1.3.1.01).
The new desktop icon is identical to the old desktop icon.