Hi Jordi, I have given up on TW4 for the moment as I have just spent 5 hours rebuilding a 18 pano tour in TW3 after so much grief with TW4 so not very happy.
One of the main problems is the publish setting and the new file output. It takes forever to load all the files. Also if you make any slight changes in the tour some of the "hint" files in the resources folder get re-named.
The viewer is very juddery compared to TW3 and also I found that for some reason if I clicked on Full Screen the Thumbnail of the pano just disapeared for the rest of the tour, but not always. This suggests something is unstable.
All in all at the moment TW4 2 steps forward 5 steps back, i'm sticking with TW3 for the moment until hopefully things get ironed out. A shame as I liked some of the features but they seem to come at a high cost in the production time.