I've received this answer from
service@artatech.com:
"Hi,
https://onyx-boox.com:2445/public_do...4673293360c664
Please stick the link above into your browser and then confirmed by pressing the enter button pop up with a packed file named ivona.zip
Please save this file to your computer and then unzip it to a directory ivona were three subdirectories with the following names "deu", "eng", "pol".
Finally, please replace the built-in memory card reader directories (that is, remove the old and then paste the new)
Please remember not to change the directory name because otherwise ivona will not work."