Found it - Duh! Go into Discover tab, Pick your switch and delete it. You can add it back in or re-discover it and an option to unmonitor it as well (haven't used that on yet).
I have CMCNE 14.0.1 and trying to delete a switch/fabric config for a switch(DS-300B) that is powered off (flooded from Harvey) and CMCNE see's the Switch State as "On-line" but the Status is "Not Reachable". When I try to disable the switch thru CMCNE, it says "The switch xxx.xxx.xxx.xxx Disable Failed" I have tried "Rediscover" and get  "Rediscover initiated for the fabric (Fabric Name)" but events show "Switch unreachable" and "Seed Switch unreachable. Please change the seed switch for this fabric with a reachable switch". Any ideas???
CMCNE 14.0.1 Unable to delete/disable switch that is powered off