Symptoms

How to upgrade K2 for SharePoint? It seems that Setup Manager does not recognize SharePoint 2010.

Is there a special way/installation files for upgrading K2 for SP 2010?

 

Diagnoses

After upgrading the K2 Server(s) you have to run the 'K2 blackpearl 4.6.11' installation on all SharePoint server(s) to upgrade the K2 for SharePoint 2010 components to version 4.6.11.

Then after upgrade of the K2 for SharePoint 2010 components on the SharePoint server(s), the "K2 for SharePoint Configuration Wizard" will need to be run from the Central Administration server to upgrade the solutions, update, and also re-activate the K2 features and Configurations to the necessary site collections.
 

Resolution

See explanations above and, also, relevant K2 documentation section:

http://help.k2.com/onlinehelp/k2blackpearl/icg/current/webframe.html#install_k2forsharepoint.html