I don't think there's a figure-level, or even actor-level flag for sphere zones in the cr2. The zone information is embedded in the joint listings in the Channels block, in the jointXYZ and twistXYZ listings for each actor, as well as any affector listings for child actors (such as "twistY lShin_twisty").

It sounds like you're using a pre-Poser 8 joint editor. IIRC, once capsule zones, then weight maps, were added, the joint editor format changed.

Does the problem affect more than one actor, or only one? I'm seeing actors without the sphere zone option in Poser 7. In all cases, these are actors which lack joint and twist listings in the cr2 (such as the root actor, like Hip, would lack the option). Such actors only list a joint center when checked in the joint editor.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.