Recently created topics in PBwiki tagged with plugin

I have a free pbwiki, where I set up and have in full bloom a calendar plugin. Many dates/events scheduled therein.

I just purchased a premium wiki and I am going to migrate from the free one to this new $$ one.

Question is: can I move my calendar, as is, from the free to my new wiki?? or will I have to install a fresh calendar plugin and repopulate it from scratch? Seems like a lot of work, possibly unnecessary. So, hoping for an easy way to point to my old calendar.

does anyone know if there is a way to add another sidebar that can be edited with the point and click editor?

I created a new button called "Add Tag". This is because I have chosen to suppress the footer which unfortunately obscures the way to do page tagging.

By adding a new button, which shows up for every user, how to tag should be pretty obvious.

Problem is: How do I amend the addButton code so that it will actually add the tag? Creating the button was easy: I used the following code from the widget library to get the button to appear: