When I launch the Dev Server, it tells me The game hasn't been activated for you account? A. The Client Log Client logs (file extension.clog) are files generated by the War Thunder client and show a reflection of all the actions a user has performed in one secluded game session.As soon as the launcher initializes the start of the game, a new Client Log is being started, which is finalized when the client is closed (the game session ends) Install like a regular War Thunder copy in its own folder.