Installation and removal

VSPackage (VSIX)

About .vsix

To install:

Manually:

VSIXInstaller.exe <downloaded_file>

To remove:

VS IDE - Tools - Extension and Updates ...: Uninstall or Disable

Manually:

VSIXInstaller.exe /uninstall:94ecd13f-15f3-4f51-9afd-17f0275c6266

CI.MSBuild

Read here

Devenv Command-Line

Read here