i had the same problem, and it was the enginelauncher program that caused it. you might have noticed that as soon as you click generate visual studio files, the blue colored engine launcher pops up.
i had the engine files etc, moved to another location. thus the enginelauncher tried to download it again, but could not do it, as i didnt have enough disk space. for some reason this whole debacle also stopped tgenerating the visual studio files.
try making enough room on the partition on which the enginelauncher wants to download the engine, and see if it enginelauncher.exe fires up without problems.