I installed Windows 8 and I'm not sure how to get to the metro versions of IE or Chrome. The tiles show up in the metro start menu but they launch the desktop applications.
Windows 8 – How to Launch Metro IE and Metro Chrome
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Related Solutions
I would first try to reset internet explorer settings. It's also very likely the option you had access to isn't 100% complete and there may not be a stable or easy to find way to revert.
Get to the standard control panel window, and find internet settings, get to the advanced screen, there is a reset to defaults button there.
Worst case: reinstall a fresh copy of the developer preview.
If Chrome's set to default and still doesn't launch in Metro mode, despite opening it from the Start Screen then you'll have to instruct Chrome to open in Windows 8 Mode.
To do this, Click on the Chrome menu and select "Relaunch in Windows 8 Mode"
Best Answer
Press the gear icon and then "Internet Options" and press "Programs". Make sure Internet Explorer is the default program. Make sure the box "Open internet explorer tiles on the desktop" in NOT checked.