I double-clicked a word list and just saw a window with strange codes.
Double-clicking on a word list opens the list in a word processor, rather than in Sona Vocabulary Assistant.
In the current version of Sona Vocabulary Assistant, word lists should be opened from the Menu screen in Sona Vocabulary Assistant, not from the Finder (Windows Exporer).
See also "How do I open a word list for study?"
To edit a word list that already exists, see "How do I edit an existing list?"