Z 1 z 5 hwěžkow pohódnoćeny

wot yaman dnja Meja 1, 2019 · trajny wotkaz

Importing .mbox file but nothing happens...
Ready to make it 5 stars but some assistance would be required since it simply doesn't do anything...

Tried to understand if the Thunderbird version was wrong:
I have version 60.6.1 maybe your add-on doesn't work on this version of TB?