Saving data to storage when shutting down MC

Hi.

I downloaded MC 6.0 today and installed it.
What I used before is MC 6.0 beta4.

Whenever I shut down MC, it says
"Saving data to storage
(...downloaded cache to local database...)",
and this window never ends itself!!
(even when I was working offline
before shutting it down)
And it seems that, when I close that window
manually through task manager,
I remain online.

How can I solve this problem?

Regards.

Dear rokanten,

Could you please come to our Live Chat before 11AM EST so we can connect to your PC remotely and analyze the problem?