Hello 
I got a new computer, so I had to install VS 2015 and Monogame again.
After the installation of Monogame all the templates of VS2015, including the templates of Monogame are missing.
When I uninstall Monogame, the templates of VS2015 are back.
If you could help me it will be great!
Thanks!!
Are you an admin user and did you elevate the MonoGame installer?
Try copying the MonoGame files after an install, uninstall it and pasting the templates in the templates directory and see if that works better… or if you do not need the Content Pipeline Tool, try NUGET?
I am still new to the various issues surrounding installs of MonoGame templates so the above are just rough thoughts.
Valentine