Updated to Win 10 Version 2004 (19041.388). Apps for websites aren't working properly. Clicking a link in an e-mail for Twitter repeatedly bring up the "How do you want to open this?" dialog.
Example:
Control Panel - Apps for Websites shows links for t\Twitter should be opening in the Twitter app but the dialog still appear and has no option for Twitter.
I have tried to reset as well as uninstall and reinstall the app.