If you are seeing the Last Flow times not updating in Enable Interfaces, you may need to apply one or both of these fixes.
Check your <installdir>\reporter\logs\PumpLog20xx-xx-xx.log for either of these 2 possible errors:
Windows Server 2012
To resolve the "Object reference not set to an instance of an object" error:
Mysql -P3308 -D harvester -t -e "update routers set PollState='InitialPoll', stateretry=0, reboottime=0 where PollState ='RebootRefresh';"