I've had this problem with every version of SGP I have used. I have a Atik 383L and frequently it hangs up during download - I normally have to completely exit out of SGP then start everything back up. It appears to happen if I abort a exposure, weather in frame and focus or during imaging. After I abort I tend to have problems with the downloads hanging up. With the latest version it seems to be worse.
Any help would be greatly appreciated