While the site still might be functional it is no longer maintained. No new features will be added and no bugs will be fixed. Expect the site to go down at any time.
You can sign up for an account if you want to try it out, but don’t put anything important here.
If you have an account, you can export your notes. Go to your home/root note and select “Download notes…” from the menu. After that, you can choose to delete your account if you want to also remove your notes from the database. Select “Account” from the menu, and then “Delete Account” at the bottom of the page.