Revert "Delete AtWin.vcxproj.user"

This reverts commit fd2200ee498351f5340cdff38b824874812bce98.
Revert "Revert "Delete AtWin.vcxproj.user""

This reverts commit 9a5dc3096329df243fcf60392c5de1df7d9c0748.
Revert "Revert "Revert "Delete AtWin.vcxproj.user"""

This reverts commit e3b7f5511306da4834e91306fbf2d43132423e33.