After updating my folders and emails are gone

I do not believe. Today appeared a window suggesting to install an update. After clicking and install. All my folders with hundreds of emails are gone. I’m furious! There was a lot of work there. Now all messed up! And now?

This video shows the behavior of the bug after upgrading to version 6:

(I am use: Win7 64bits, Gmail, Pop3)

I see in video description that problem is solved for you, is it true?