<blockquote>
<p>Help-Debug shows: "GTK 2.24.31, GLib 2.50.3"</p>
</blockquote>
<p>Yeah GTK2</p>
<p>Your package list shows that there is not a GTK3 package for Debian, thats why I said you need to compile to test it.</p>
<p>You will need the debian <code>build-essentials</code> package installed and the GTK3 <code>-dev</code> packages.</p>
<p>Download the Geany source tarball and extract it to a new empty directory, lets say <code>/some/where</code> so you get <code>/some/where/geany</code>.</p>
<pre><code>cd /some/where/geany; ./configure --prefix=/some/where --enable-gtk3 --disable-html-docs; make install; cd ../bin; ./geany -c ../config
</code></pre>
<p>(well you said you wanted one command :)</p>
<p>That gives a completely isolated Geany in <code>/some/where</code> for testing that does not interfere with your installed one or your normal user config.</p>

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