Update: After no one responded, i deleted everything in my mods folder and folder it self. Then i did everything as i did in the last time, only difference was name of my mods folder. At first time it was ''Mods'', then i created it as ''mods''. After that i did everything same as before, downloading vehicle mods etc. And my crashing problem was solved. I guess problem was with the name of the folder. Now it works perfectly as its should be.