Attic fan efficacy is a hotly debated topic in the field of home energy performance, so get ready to hear some conflicting opinions!
Humidity control using an attic fan in New Jersey is, IMO, a futile endeavor. The “correct” humidity level for the attic is equal to the outdoor humidity, so setting a fixed value will have no purpose other than to waste energy. So, I’d set that to the max so that only the temperature control is active.
Now, as to whether the attic fan should be there in the first place: if you have good passive venting (clear soffit vents combined with a ridge vent and/or gable vents), I’m of the opinion that a fan is not needed. If you have poor passive venting, then the fan may be a good tool to get by until the next time the roof is replaced and venting can be added. Also, make sure that you don’t have any exhaust fans from within the house venting directly into the attic.