While we wait, you might want to try out the Lbook firmware prior to the release of the new Astak one.. it is more responsive than the current 1104 firmware, and prettier looking. Parts of it will stay in Ukrainian unfortunately, but it's not an issue once the majority of it is switched to English in the settings. Seems to do a very good job with textfiles too.
http://www.lbook.ua/ru/downloads/firmwarev5