Hi,
i have installed version 2.7 of your plugin and since that i do not see see the button of the manager in on top of my editor anymore.
i have also tried to to use the free add-on Advanced TinyMCE button but if i enable the add-on all my editor buttons are gone ๐
i have attached 2 screenshots
first one is of the editor with the missing button
the second one is showing the editor after activating the add-on