Current version is 4.4 from 2021-12-27 (What is new)
System requirements: Windows XP SP2, Vista, 7, 8, 10, 11 (.NET Framework 2.0 or high)
Audiobooks with subtitles on this website:
Also a huge number of audiobooks in all languages: LibriVox.org
Also you can use
Audio Tracks from Movies and
Audio Tracks from YouTube
All this you can use with WorkAudioBook!