The Summa Cutter plug-in is compatible with Adobe Illustrator CSX versions. Practically, all CS versions of Adobe Illustrator are compatible. As you can see in the image below, you can install the plug-in for all the Illustrator versions. In the second picture, you can see the install procedures and plug-ins availability. Choose Full Installation or manual installation and click on each of the Install buttons.
Plug-in compatibility:

Install options:
