User Templates
Supported on: At least Windows Server 2008 R2 or Windows 7
Registry
HKCU
software\policies\microsoft\office\16.0\ms project\options\save Options
defaultusertemplatespath text Description
Specifies the default location in the computer system for saving and opening workgroup templates. If you enable this policy setting, the location first appears in the Open and Save As dialog box. If you disable or do not configure this policy setting, the users default for this setting is followed.