Just curious, how many mods total do you have in your folder? They have to be active. At the time of typing this, I have 402 mods.
How do you only have one? As for me, I have over 600+ mods. But, since having more mods slows BeamNG's performance down, I'm trying to not have as many mods activated at once. Currently I have around 376 mods activated. For the inactive mods, I put them in copied mods folders.
In my mods folder I have: Canyon of Speed DW Config (which I guess I shouldn't count ) D15 Supercharger Sound Ghosts Desert OldEngineBurnsidev13 ....a bunch of font files? lol Oh and this picture:
Idk how many mods I have anymore... Half of them are using either the levels or vehicles folder in the BeamNG folder located in Documents, and the other half of them are in my mods folder I think... Anymore I really only use content I am making or preparing for release.