Ohodnoceno 4 z 5 hvězdiček

The add-on works, exporting the email folder structure and compressing everything into a zip file. If the folder names are in Latin, everything is fine. However, there's a problem with Russian folder names – the resulting subfolder names are unreadable, with a random set of Latin characters instead of Cyrillic. How can I solve this problem?

An example of such a folder name, instead of Cyrillic:

&BCMERwQ4BEIENQQ7BE8EPA-.