<p></p>
<blockquote>
<p>Steps to reproduce...</p>
</blockquote>
<p>Ok, can reproduce. I also noticed for opening the 2nd file after re-opening Geany (using right-click Open With Geany menu item in Windows Explorer), that Geany doesn't launch. If I try again, it opens in a new window with the original file (same as first window) and that 2nd file, just as you described.</p>
<blockquote>
<p>Unless, of course, you meant the crashing issue?</p>
</blockquote>
<p>Nope, just the instance/socket issue.</p>
<hr>
<p>As for the crashing in GDK, I'm not sure but if you have or want to install msys2, you could compile Geany from Git against newer GTK/GDK/etc libraries; it's possible the docking/crash has been fixed already.</p>
<p>Feel free to separate the Issues into two separate ones since as you said it's two seemingly unrelated things, or don't if you don't want to.</p>

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