Well, I figured it out after all
Today I tried to make it work with 4.10.1, hoping to finally fly some cold war era jets. Everything went smooth, like before, until I unpacked Jet War core to my SAS folder- 20 % crash. I was so desperate, tried many possible solutions, including buttons file, redownloading Jet War, disabling and enabling various mods from JGSM, double- and triple-checked .ini and .ru files, files paths and size... All for nothing, everything I got after 2 hours of fighting with it was 20 % crash. I'm tired of this and most of all dissapointed.
Small update: after changing graphics provider from OpenGL to DirectX, on 20% I get the C++ Runtime error, forced to terminate in an unusual way, blablablah. Reinstalled my C++ Runtime libraries, reinstalled Java, still got the problem. Please... Help.
Big update: God, it's fixed!
I'm so happy now. The problem was in incorrect version of SAS Engines Hotkeys Carriers mod, somehow I had different version of this mod. RC version works perfectly, as well as Yak-36, MiG21 and L-159