Hello darseno, thank you for reply!
6. I do not see a button to open the external dictionary, although your help file speaks of such a button. I can't see any way of opening the dictionary at present."
It could be opened via tap action (for detail see tap zones)
There is new 0.26.0 build avaliable on site with:
* Customizable screen brightness
* Custom screen overlapping on page turn
* Dark and Light application Themes
* New crop actions added for tap zones
* Open recent book on start up option