Enmanuel, I purchased the $25 version today and I am having the same problem. I create a box, save it, see the saved message, and nothing appears in the history column. Please let me know what I can do to fix the plugin. I need it for a project I am working on.
I am having the same problem. The save button does not work.
I get around the problem by making the edit then cloning.
I then edit the page containing the box and change the id to the new (cloned) box.