@Radekk17:
Turn 180!?! Great! I don't know what could be the issue with SS using the HS launcher, I have not tried ot for myself. I can only assume it might be a scripting issue similar to that posted by IE about BC. You are using the correct SS 6.4 config file?
http://www.twcenter.net/forums/showthread.php?t=381707
@deathteam15:
The way the game engine works, there is no way to make the hotseat launcher load save games without relaunching the game. Having it quit automatically after ending a turn fits in with the design of the launcher anyway. After you play a turn, there is nothing you can do until your next turn is ready. Quitting the game allows the player to continue with other tasks until their turn is ready again.
The hotseat launcher is designed to make it easier to play hotseat games over a network/internet, where you have no control over when people play their turns. If you are playing with a friend locally, perhaps it would be better to play a normal hotseat game on the same PC?