The current version indicator (a Blue gear on a process revision icon) 
is a visual indicator to be used as part of your own procedures if desired. (The Blue indicator is also used as a flag for some FactoryLogix xTend integrations.)
Log into the NPI client application.
Select Home > Process Engineering.
In Define Processes, select the Open Process
button (the folder).Find and select the process you want to mark as current in the Please Select a Process Revision dialog.
Select the Mark Process Revision as Current
button at the top of the window, then select Yes when the confirmation dialog displays.
Notice that the icon for the process revision now includes a Blue "gear": 
Note
A process with a Green gear 
icon indicates the latest process revision created for an assembly.