Symptoms

After installing MS Visual Studio 2015 on a machine already having K2 for Visual Studio 2013 installed, you do not see the K2 templates in VS 2015.
Neither running K2 blackpearl Setup Manager from the start menu, nor repairing K2 for VS 2013 resolves this behavior.
 

Diagnoses

K2 for VS 2015 is technically a different component than K2 for VS 2013, and must therefore be installed separately. K2 blackpearl Setup Manager, when run from the Start Menu, only allows you to reconfigure, repair, or remove existing K2 components installed on that machine.
 

Resolution

Use K2 for blackpearl Installation Media to run setup.exe. From this K2 blackpearl Setup Manager, you can install additional K2 components.