Been in contact with David Heath and he basically says it’s not his problem. I had to to an install on a new machine. What happens is that when I reinstall I see Scenario and Map Maker. When I try and use them they don’t work and then disappear from my computer. Tim.
Because the files disappear after you try to run them, more than likely your virus protection has automatically tagged the files and "unsafe" and quarantines them.
On some virus protection programs you can open the program and find the files which have been quarantined.
If your program allows you, then find those files, designate them as "safe" and put them back in the CO2 install directory in Steam.
If you can't find them, try installing the game with your virus protection paused.
Then try running the MapMaker and SceneMaker while the virus is paused.
If the game installs, the files show up, and the files run then the virus protection is the culprit.
If you want to run the virus protection while you play, you'll have to do whatever the virus protection program requires to designate the files you want to run as "safe" and / or "excluded" from a virus scan.