I followed the instructions to update to version 6 too. The problem is, that it is not really an update, it is installing another, supposedly better version by overwriting the new version. A lot of settings (such as menus and sidebars) did not migrate, which has to be adjusted manually. I was not able to configure the big slide header the way I had it on the previous so I decided to go back to v4.

I would consider upgrading again to v6 when it is really an update and I can choose which features I want changed on my blog or not.