Better geoipupdate documentation

_sources/index.rst.txt

@@ -510,7 +510,13 @@ Start by `registering for a free GeoLite account`_, and signing in.
 Then, navigate the to the `License Keys`_ page under your account, and create a new license key for the version of
 `geoipupdate` that was installed.
 
+.. warning::
+
+   The configuration file `format is different for older (i.e. <=3.1.1) and newer (i.e. >=3.1.1) versions
+   of ``geoipupdate``. Be sure to select the correct version for your system.
+
 .. note::
+
    To check the version of ``geoipupdate`` that is installed, run:
 
    .. code-block:: bash

index.html

@@ -707,6 +707,11 @@ comply with various privacy regulations</a>.</p>
 <p>Start by <a class="reference external" href="https://www.maxmind.com/en/geolite2/signup">registering for a free GeoLite account</a>, and signing in.</p>
 <p>Then, navigate the to the <a class="reference external" href="https://www.maxmind.com/en/accounts/current/license-key">License Keys</a> page under your account, and create a new license key for the version of
 <cite>geoipupdate</cite> that was installed.</p>
+<div class="admonition warning">
+<p class="admonition-title">Warning</p>
+<p>The configuration file <cite>format is different for older (i.e. &lt;=3.1.1) and newer (i.e. &gt;=3.1.1) versions
+of ``geoipupdate`</cite>. Be sure to select the correct version for your system.</p>
+</div>
 <div class="admonition note">
 <p class="admonition-title">Note</p>
 <p>To check the version of <code class="docutils literal notranslate"><span class="pre">geoipupdate</span></code> that is installed, run:</p>