Hi Michael,
thank you very much, the problem was that in the tasks that Sanjay wrote me to do, there was a personalization reset at only one or two places. However, now I know that I have to click on Personalize-->Reset to Default on EACH and EVERY screen, not just on the initial one, or when the guide tells me to do.
Thank you for it, it was a great help!!
It seems that this instruction not only deletes an existing personalization, but also makes some rendering according to the latest configuration since, after the configuration, the UI is not getting adjusted only by this 'reset to default' setting.
Please correct me if I'm wrong.
Thank you very much,
Tamas