Rated 4 out of 5 stars

New to Thunderbird 68 and the ImportExportNG Add On as well. Really like the tool. I'm migrating from WLM. Like others have reported, I tried a wholesale import of my WLM folders but only the folders came across, none of the messages were imported. I tried again using a single folder with same results. Folder created but no emails. Thankfully, I have very few folders so I was able to export and then import folder-by-folder. That worked flawlessly. So far, I'm extremely pleased with the more stable operation and additional features.

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

MarshMan
Thanks for the nice review. I am still trying to figure out what's going on with some of the imports with WLM. There seems to be sub mixed results that make the analysis harder. If I am understanding your post clearly, it appears that when WLM exports warns on one folder you have an issue. Another user reported problem with some of the metadata files that are used by Thunderbird but appear to be crossing a problem. Sorry I don't have an answer yet but please track within the repository. If I find something I want you people to confirm the fix.
Stay tuned!
Christopher