Rated 5 out of 5 stars

Good but not working with current TB 60 beta. TB crashes (not responding) whenver opening a mail with winmail.dat

This review is for a previous version of the add-on (1.2.22). 

I tested the add-on in Thunderbird 60.0b11 on a debian VM and am not encountering any errors. I suggest using Thunderbird's repair folder function if you are using IMAP. If you encounter further issues please submit an issue to the Github page.