Symptoms

After upgrading from 4.6.7 to 4.6.10 I still have a K2 ViewFlow 4.5 entry in programs and features
 

Diagnoses

After upgrading from 4.6.7 to 4.6.10 I still have a "K2 View Flow 4.5" entry in programs and features. Not sure if something did not get upgraded or if it is safe to uninstall this.
 

Resolution

The "K2 View Flow 4.5" component was used for viewing the Viewflow without Silverlight and can be removed safely. As it is not a part of the K2 Blackpearl installer, you will need to Uninstall it directly from the "Program and Features".