Hi ,
I’m seeing the same symptoms in 4.12.5. I’ve tried associating the .uproject file with the UE4Editor.exe in the 4.12 …\Win64 directory. The menu remained unchanged. As you stated, when I later opened the launcher, it prompted to “re-associate” the uproject file and the project opens correctly.
For what it’s worth, I also tried associating it with UE4Editor-Cmd.exe which also had no effect.
It would be great to generate the visual studio files with a right click, but I’d be happy to use any other method that you could provide.
My OS is Win10. VS is VS15, Community. Presently using UE4 prebuilt (not DL source). I was able to generate VS project files under 4.11.
Note- This entry is now OBE. The menu is now working for me. See the posted answer for the full description.