Why do you need to open them? Rename them to .txt files then edit it then save as .cct
It works, you just haven't found the correct version yet. I have the correct version, and it works perfectly for me.
/facepalm
Right click on the MX director application -> properties -> compatibiltiy -> tick the box next to 'run this program in compatibility mode -> select windows XP -> apply -> OK
Run the application as you normally would