The convertDivs setting is enabled by default. It removes divs and converts them to <p> tags (without retaining any class names you may have applied).
As with normally editing XenForo pages, if you want to use certain HTML functions such as bullets, etc. you will need to wrap your content in <div class="baseHtml"></div>.
That is now retained after saving with this update.
It's also worth noting that I forgot to mention I added a bit of extra JS in the first version that allows you to use Ctrl + S or Cmd + S to save the page while you're in the editor.
