Rated 2 out of 5 stars

Kein Export im Mbox Format.
Was der Export von Ordnern ohne die Emails bringen soll, kann ich nicht begreifen.
Der PDF-Export ist praktisch, er funktioniert prima.

This review is for a previous version of the add-on (4.0.4). 

I understand you're having a problem exporting mbox file format. Do you see any errors in the error console?
- what OS, Thunderbird/NG version?
- what specific actions are you taking?
If possible it's best to post to initiate you in the repository:
https://github.com/thundernest/import-export-tools-ng/issues
Christopher