My answer is only for 2012 TV (E / ES / EH) Series:
- Unzip the exported application to a USB drive into the folder with your applications
- Example: SampleApps_1.000_Asia_20140218.zip, resulting in X: \ SampleApps \ config.xml
- Plug in a USB drive
- Turn off the tv
- Turn on the TV and go to smart hub
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