I am wondering how to open multiple instances of CMS Intellicad 8.1 on the same computer. Whenever I try to open multiple instances of the program, I get an error message saying that I do not have enough licenses. I have a second license, if I install the second license, would this work?

Probably you need to uninstall and reinstall CMS IntelliCAD 8.1.

For OS compatibility and maintenance reasons we're recommending users to be running the latest version of CMS IntelliCAD.