How can I reset iOS 9 Universal Linking settings?
You can long-press on a universal link and it will give you an action sheet with an "Open in 'AppName'" option. Once you select that option it will default to opening the links in your app again.
You need pull down in opened page in safari from email, etc to see button "Open" (this button is system in safari). If tap "open" after
I accidentally tapped "mywebsite.com >"
universal link will work again under the old scheme.The result of this action preserves.
@dan is right, long-pressing the hyperlink will give you the option to open with your app again through universal link.
If you have an Apple Smart Banner in place, you can also click on its 'Open' hyperlink to active universal links on your app again.