Editor crash at startup

Hi
I’m fairly new to UE4.
I have start a small archviz project scene few days ago.
When I tried to build the scene, it build didn’t export as the output folder was empty.
By browsing the settings I found a settings that said something like : “build at startup”
I enabled it and my editor crashes at startup.
I tried multiple times but didn’t fixed it.
I then moved my project out so it’s not listed anymore, but the editor still crashed at startup.
I re-installed but it didn’t fixed it.
I updated to 4.8.1 but didn’t fixed it.

I installed UE4 on another computer and the editor work fine, untill I add my project, then the editor crashed at startup on that one as well.
So I deleted few folder containing what I thought was traces of previous build attempt and I was able to start my project again on the second computer and to build successfully.

Unfortunately my main workstation can still not start UE4 editor as it’s still crashing.

Any ideas how to fix this?

Cheers
Stan

No one?
No solution?
Don’t tell me the only solution is to format :slight_smile:

Stan