Hello Cameron.
With the Gizmo plugin beta version, I had SkyMaxx 3.3.2 on
Sierra running. But Gizmo has now expired. I do not know why this is so.
However, I believe that a purchased software should work. If there is a
problem with Sierra, you should solve it. This is not the task of a user.
With Freeware you can still have understanding, but not with Payware. So I
ask you to find a solution right away.
18.11.2016 Continuation of my research:
PS: Now i have downloaded this Gizmo plugin from this link.
https://dl.dropboxusercontent.com/u/948813/Gizmo/binaries/Gizmo64.plugin-16.11.03.1645.zip
now it works.
You could have simply communicated this link to the customer. The official version of the Gizmo website does not work.
Regards
Horst