I deleted the Internet Explorer app.
Now I cant find it in the store and when I pin it, it runs like desktop application and not a metro application.
Metro app screenshot :
Pinned IE app opens as follows :
How can I get the Metro IE back?
You need to set Internet Explorer as a "default program".
In the start screen type: "Default Programs", then choose "set your default programs", then select "Internet Explorer" and click "Set this program as default".
This will transform your IE into a Metro style app. If you have a pinned shortcut of IE in the start screen, it will be changed into a Metro IE tile.
To get it back you may have to uninstall and reinstall Internet Explorer (which should deal with both, desktop and Metro):