Extremly laggy Vehicle Customization

Hello everyone!

I'm having some problems with my BeamNG Drive installed on my pretty decent computer. On the driving itself, or even on vehicle selection, game runs pretty fine at 50FPS on max settings. Whenever I go to the vehicle customization game starts to run BAD, and I mean VERY BAD. It's almost impossible to choose anything without waiting for it like 30 sec. What's causing the problem? Cache is cleared!

 

Pausing the game while selecting parts might help a bit.

 

Yes, I do like mods and I do like to install them, but mostly it's vehicles, not parts. I remember like 2 updates ago everything started to run smoothy, after that it was getting worse and worse.
Here you go:
> Mainboard : Gigabyte Z77-D3H

> Chipset : Intel Ivy Bridge

> Processor : Intel Core i7 3770 @ 3400 MHz

> Physical Memory : 16384 MB (4 x 4096 DDR3-SDRAM )

> Video Card : NVIDIA GeForce GTX 660

After turning off all the mods game runs the same.