Thank you for downloading Ext JS 4.2.0.
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To get started, unzip the archive to your local web server and navigate to
http://localhost/your-ext-install/ to view the documentation and complete working examples. Any samples that use Ajax will need to be on an web server in order to work correctly.
First timers, be sure to read the handy Getting Started Guide.
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Download Sencha Cmd, the command-line tool to scaffold and build your next Ext JS app for Mac, Windows and Linux.