title: Monetdb on windows : unable to connect to mserver5 after upgrade
body: <p>First message on this topic.
  -I had an old monetdb installation on my windows laptop
  -Did the upgrade in Oct2020-SP5
  -It really looks like I can start the server</p>
  <pre><code>C:\Program Files\MonetDB\MonetDB5\bin&gt;mserver5
  # MonetDB 5 server v11.39.17 (Oct2020-SP5)
  # Serving database 'demo', using 4 threads
  # Compiled for amd64-pc-windows-msvc/64bit
  # Found 15.862 GiB available main-memory of which we use 12.928 GiB
  # Copyright (c) 1993 - July 2008 CWI.
  # Copyright (c) August 2008 - 2021 MonetDB B.V., all rights reserved
  # Visit https://www.monetdb.org/ for further information
  # Listening for connection requests on mapi:monetdb://localhost:50000/
  # MonetDB/GIS module loaded
  # MonetDB/SQL module loaded
  # MonetDB server is started. To stop server press Ctrl-C.
  </code></pre>
  <p>But when I want to use the mclient, it asks the user and password and then... nothing
  <a href="https://i.stack.imgur.com/I9Fjv.png" rel="nofollow noreferrer">here the stupid screen I am blocked in</a>
  Same thing with an ODBC connection : after a long time, it fails</p>
  <p>I have no idea of what's wrong.</p>