I’m encountering frequent crashing of Folding Text in macOS High Sierra. It usually happens when I start FT, especially when double clicking an FT document. The crashes typically happen when FT has started and starts reading the document (as it appears). Then you get the dialog window macOS presents with Ignore/Report/Restart buttons.
I’ll update this when I have more details to add. Will there be an update of Folding Text soon?