I added 10 "ENABLED" nodes to my arcticcoin.conf, deleted gmcache.dat and peers.dat as suggested and restarted the wallet, but same issue persists. "No Block Source Available". I too am using it just for learning about masternodes, it would be nice to get it working again if you have any other suggestions.
I understand your disappointment, unfortunately I have no other suggestions to give you and although I may seem pedantic and repetitive I assure you that even today I opened the wallet several times and it worked, as always synchronizes with at least 15 or 17 peers within minutes from opening of the wallet. That's all!

You are probably on a fork. Only way to fix this now that you have added valid nodes:
C.