It worked OK for me.
I downloaded the zip and unpacked to own folder.
Dragged the magicam.c2addon into C2, got the warning about installing from trusted sources etc, then relaunched. Opened example with no problem.
If I start a new .capx, Magicam is listed under General.
Are you using the Steam or standalone version of C2?
If your vision so exceeds your ability, then look to something closer.