Hey Juan
the only way to get rid of the Panotour popup is to pay an additional fee to Kolor. I can’t remember exactly how much this is but is worth paying if you don’t want to have to have the Panotour popup coming up every time.
It is also a problem with Ptgui, although there isn’t a way of removing this, even with a good knowledge of html.
There are lots of tutorials on the Kolor website for Panotour. But I think there is only limited functionality for Krpano, so not many tutorials.
It sounds like you are following a similar approach to me. I no longer use Krpano, but use (mainly) Ptgui and (occasionally) Autopano Giga. I no longer use Krpano or Ptgui for the viewer and prefer Autopano Pro. But have grudgingly paid the additional fee to remove the Panotour Pro popup.
good luck!