Cannot Run TemplarGFX's Aliens: Colonial Marines Mod Thread

This is a bit of an odd one.

I reinstalled ACM for the first time in years after running across TemplatGFX's ACM Overhual mod. I ran the game for a bit, remembering just how bad the alien AI was, and then I installed and rant the mod. It ran flawlessly, and I was really looking forward to streaming the game to show the difference.

I had to reboot my PC for another issue, and once it was back up, I went to run ACM... and it would not run. Steam showed it was running, but nothing happened. The game did not even show up in Task Manager.

That is, it did not show up there till I closed Steam and told it to Exit Now instead of wait for ACM to close. Then ACM showed up in the Background programs, and I was able to End Task on it.

I tried verifying the ACM files. I tried uninstalling the game and reinstalling it and the mod. I even went as far as to delete the ACM folder in my steamapps\common, just in case something was left in there that was breaking it. Once I reinstalled after doing that, I could run the game again until I once again installed the Mod. Then the same issue cropped up.

About the only thing I have not tried at this point is a manual install. I will probably try that this weekend.

Anyone else run into this particular problem with this or any other mod before? If so, what did you do to fix it?