Custom battle

After a few rounds the client wont let me remove a fleet from a previous round. and the entire custom mode eventually breaks and wont let me click it any more without crashing the client.

also the game randomly closes after i click on something about every 20 minutes.

i have windows 8 which is probably the issue any clues?. and how do i get online

Missing scenario file

I’m having the same problem. An error pops up saying Missing senerio file so now what?