Happy ST 4 prose-writer here. It’s working well for me.
One new default needs to be turned off and I just need a pointer how to do that. When I select text, the selection seems to be automatically storing the text into the clipboard, and a little icon of a text page pops up indicating I can drag the selected text to a new location. I’d prefer the cut/copy/paste functionality return to the standard way. Also, when I’ve selected a few paragraphs, I’m having trouble turning OFF that selection. i.e., one simple left-click should release the selection, but that’s not always working. Any help/thoughts appreciated.