4.6.1 on win7 64bit.
It’s very unstable and crashes very frequently. I spent more than 60 hours developing a prototype and suddenly the editor crashed and it refuses to open my maps. I tried everything including deleting loads of files and delete then re-install the editor but nothing worked. Finally I realized that the editor is taking more than 18GB of RAM out of my 24. When I gave up I reformatted my PC and installed a fresh win7 64bit then updated it to the latest updates and installed only visual studio express then Unreal. Guess what, It crashes AGAIN!!
I have submitted loads of crash reports please find a solution. The last thing any game designer wants is to lose so many hours of work.