I got the same problem long time ago,but it was different version of dekaron.
We solve the problem,after adding txt file to game with server IP.
I was helpful then,but i dunno how it works here.
I prefer download new firework 4.0,add all exe file from dekaron to ur firewall,check antywir for any block exe file or game.
Maybe ur antywir scan system and detect exe file of dekaron and say: It's trojan and put it to another file when he block it,game run normaly and work,but he block it after while and u got dc then.