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Thanks for this EXCELLENT add-on, very useful when one has a large number of hierarchichal folders!
Sadlly enough, Thunderbird has broken it with its new format for add-ons in version 78...
Any hint as of when a version compatible with the new Thunserbird add-on interface may come to life?
Thanks in advance.
Dominique

PS: I have no idea about the Thunderbird add-on interface, but I am a developper. Is there any way I could help with the port?