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First: please tell which version / filename you printed.
I use the backside of a scalpel to flip the small support-cylinders out. That works also between the gears.
After that some pressing, without moving, you can see that the big gears start to loosen, maybe not yet rotate.
If they are not loosing at all, they are probably glued to the Holder: then your printer might be over-extruding. Try to print at bigger scale in that case. 120% worked for me with another printer.
If trying to break off the gears from the central holder, it can happen that you destroy the gear. in that case send pictures of everything via PN. Maybe I can guide you.