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<title>Welcome to Ext JS 4</title>
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<h3>Upgrading</h3>
- <p>First, check out our <a href="overview/index.html">overview guide</a> to see what has changed. <span class="meta">A more thorough upgrade guide is under development.</span></p>
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<p>Sencha also offers <a href="http://www.sencha.com/training/">training courses</a> and <a href="http://www.sencha.com/support/services/">professional services</a> for companies wishing to use Ext JS 4.</p>
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