The editor always expects the DLL files to follow the naming convention of “UE4Editor-ProjectName” or “UE4Editor-ProjectName-XXXX” (with XXXX being a random 4 digit number).
However, VS2015 is naming the files “UE4Editor-ProjectName-Win64-DebugGame”. Because of those configuration suffixes, the editor won’t recognize those files and the only way is to compile within the editor itself, which is annoying.
Any help would be greatly appreciated!