I have reinstalled the client but the problem persist. Also when I won every battle the client freezes and crashes on the exit window of the battle end.
First of all, thank you very much for your prompt reply. Unfortunately, or fortunatly, the integrity of game cache it's ok. Next week i'll try to reinstall it.
Exactly after few seconds. For my shopping i should restart client every time hoping to have time to conclude the trading. However now it happens also when I'm trying to select a mission or equipments to mount on a ship.