It's easy to open uproject on ue4editor by bat order. this is easy to use for foment and artist.
this is the bat file:
start "%~dp0/Engine/Binaries/Win64/UE4Editor.exe" "%~dp0/Games/Alien.uproject" -ModDevKit -Installed exit
put this "RunDevKit.bat" file at the project directory.
"%~dp0" is the current directory of this file.