it always happened to me everytime my GC disconnected from the server.
Causes:
-Main.exe is still running (U can try to delete main.exe in the GC Directory if you successfully deleted it means that it was not running in the system. or end task it in the task manager.)
Note: be sure to backup main.exe before doing this.
-Redownload v5.2
-Check internet Connection
-Close anti virus
-Restart PC
anyway about the name changes, it will automatically change to dango daikozoku after the hack changes to: wating for response.