If anyone knows how to manually edit controls please let us all know! I had a quick look at the files & couldn't find anything I could access/edit.
As an oldschool player I still prefer to use Mouse 2 for the walk forward control as I know many other oldies do. In the game's interface I somehow managed to add Mouse 2 to the walk forward control after fiddling for a while (something I can't do again for some reason) but I couldn't unmap Mouse 2 from alt attack. This results in zooming in every time you move forward. In other words the control mapping is a bit of a mess & is not "fully" customizable from the game interface itself.
As an aside, on the official site the version shown for (now free) download is WOLFSCHANZE_v117B_ENG.exe which looks to be a newer version than that on offer here. No idea what's updated as they still list the newest version elsewhere on the page as v1.16. Didn't bother with this as it says (Required) "Internet connection (for copy protection. and yes torrents will not work...)" and I try & avoid that where possible hehe!