After opening a number of files at once, Acorn 7 became unresponsive. So after a few minutes of unresponsiveness, I force quit it.
Now when I try to launch Acorn, it is immediately unresponsive and I never see any images or UI or menu bar appear. In the Dock control-click context menu for Acorn, I see the names of the files I had open before. So my interpretation is that something about one of these files is causing Acorn to crash, and Acorn is trying to open these files at startup.
What I really need right now is a way to restart with a clean slate, make Acorn forget the files I had open. rm -rf’ing “~/Library/Application Support/Acorn” doesn’t do it nor does trashing the app, downloading and restarting a new binary. Any ideas?