We do not have a download file for the latest version (6.26), but you can try downloading it from the developer's site
Pobierz wersję 6.1 z the developer's website
Wersja: 6.1 (x86/x64)
Date update: Jan 12, 2017
Nazwa pliku: PreziDesktop_6.16.2.0.exe
Rozmiar: 400 MB