Yup, that's a known glitch with the OLC mods. As far as I am aware, there is no known cause of yet. There is a temporary fix though. (it might get stuck again later in the game) Go to the TDC-table in the 3D compartment and click the TDC Auto Update Light. That releases the 2d wheels and it works again as it should.
I find it odd that reloading the game doesn't fix it. Usually all GUI elements get reset to default when reloading a savegame.
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