1. I would like to know how can I edit a livepano from an existing tour?, I mean, is necesary to erase the spot and make a new livepano import?.
Yes, currently, there is no "edition" of a LivePano. You need to re-import it.
2. How can I make a zoom-in and zoom-out on livepano editing mask? I think that it is necesary, if you want to make a polygon more precisely.
This enhancement is already listed on our list of enhacements for a future release.
3. I would like that my livepano starts again when I click on it after it finish. How can I do that?
We also have an enhancement about the Video styles to be able to have such video behaviours, and not only a "Loop when reaching end".
You can do it by changing the generated code, but it is not easy due to some bugs in the videoplayer plugins API.