> Have you already tried rebooting your system? If not then try that first.
Yes, I did

> Also can you try pressing Win+R to bring up the Windows "Run" dialog and then put in:
c:\Program Files\MoI 4.0\MoI.exe
and push Enter? That way you can test if it's a problem with some shortcut you're using to launch it.

I did that too! No, change in results.

> Also after you do that, open up Task Manager and see if MoI.exe is listed as running there or not.

I see MOI.exe for a while but then it disappears!

So, if I save UI sub folder in the install directory then I should be good?

(also I think I am experiencing some weird thing as well I swear I replied to your message already but I couldn't find my reply! I mean its as if it was not uploaded to the forum!

Edit: it took more than usual time!