Rated 5 out of 5 stars

This add-on is great and works really well as long as you know how to use it.

If you are having an issue importing then please do the following:

Bring up the main drop down window, go to options and click on main menu.

a main menu will appear across the top of your thunderbird session. Click on Tools, then "Import Filters" select the email account you want to apply the imported filters to, click on import and select the file you exported.

Job done!

People who do not use the older main menu will struggle with this. ;)

Enjoy your filters!