Good news: when you delete things they go into an area called "Unlinked Screens" - you can get it back
- Create a new link anywhere in your app
- Edit the Action for the link
- Choose "Jump to Screen"
- In the selection list, scroll down to the group of items called "Unlinked Screen"
- Choose your screen. Might be difficult if they are all called "Screen Title" - you will just have to go through them all