This small update addresses these issues:
Fixed bugs:
Edit user screen. Button to re-register multiplayer (using key combination) not appearing until you leave and re-enter the screen.
Edit user screen. Multiplayer registration button not showing when creating user/boat.
Remote users boats mainsail/boom started facing in the wrong direction.
Anchoring constantly being reset. This is due to changes in tide.
Shipping moving jerkily.
Add-ons notification not firing.
Tidal curve crashing.
Thank you for all the user feedback. Please let me know how these fixes get on!