It seems to be broken for everyone in the new version.
HuskerBoard
Mavric
Warrior10
Thanks, I was feeling pretty inept.
Toe
Probably either an option to turn on the menu isn't active, or there's one or more theme files that need to be updated...
https://invisioncommunity.com/forums/topic/432814-magnum-theme-support-topic/page/56/?tab=comments#comment-2830949
https://invisioncommunity.com/forums/topic/432814-magnum-theme-support-topic/page/56/?tab=comments#comment-2830949