One point. You write:
Just a quick note regarding Ctrl+O – this keyboard shortcut works when you are not viewing the File menu, and you are just in the usual Lectora interface. I’m not sure why it doesn’t work in the situation you described, but we will certainly look into it.
Yes, that’s my entire point: why would this incredibly-standard shortcut that all experienced computer users (in English) are trained to use without thought, not work in this one situation? To use a technical interface design term, this is making Lectora Desktop “modal” when there’s no reason for it to have multiple modes.