I'm using this plugin at the moment, and there seems to be an issue with updating the $questionAdditional field.
If I update this field on a question I've just written, a new question with the same other fields is generated, with different additional information.
Also, perhaps I'm getting something wrong, but using this field to insert images doesn't seem to work.
I'm looking into this, but wanted to report it so you know. Will update with any findings.