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  <div class="section" id="upgrading-from-1-6-1-to-1-6-2">
<h1>Upgrading from 1.6.1 to 1.6.2<a class="headerlink" href="#upgrading-from-1-6-1-to-1-6-2" title="Permalink to this headline">¶</a></h1>
<p>Before performing an update you should take your site offline by
replacing the index.php file with a static one.</p>
<div class="section" id="step-1-update-your-codeigniter-files">
<h2>Step 1: Update your CodeIgniter files<a class="headerlink" href="#step-1-update-your-codeigniter-files" title="Permalink to this headline">¶</a></h2>
<p>Replace these files and directories in your &#8220;system&#8221; folder with the new
versions:</p>
<ul class="simple">
<li>system/codeigniter</li>
<li>system/database</li>
<li>system/helpers</li>
<li>system/language</li>
<li>system/libraries</li>
</ul>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">If you have any custom developed files in these folders please
make copies of them first.</p>
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<div class="section" id="step-2-encryption-key">
<h2>Step 2: Encryption Key<a class="headerlink" href="#step-2-encryption-key" title="Permalink to this headline">¶</a></h2>
<p>If you are using sessions, open up application/config/config.php and
verify you&#8217;ve set an encryption key.</p>
</div>
<div class="section" id="step-3-constants-file">
<h2>Step 3: Constants File<a class="headerlink" href="#step-3-constants-file" title="Permalink to this headline">¶</a></h2>
<p>Copy /application/config/constants.php to your installation, and modify
if necessary.</p>
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<h2>Step 4: Mimes File<a class="headerlink" href="#step-4-mimes-file" title="Permalink to this headline">¶</a></h2>
<p>Replace /application/config/mimes.php with the dowloaded version. If
you&#8217;ve added custom mime types, you&#8217;ll need to re-add them.</p>
</div>
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<h2>Step 5: Update your user guide<a class="headerlink" href="#step-5-update-your-user-guide" title="Permalink to this headline">¶</a></h2>
<p>Please also replace your local copy of the user guide with the new
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