no command prompt in jupyter qtconsole
<p>After starting <strong>jupyter qtconsole</strong> I get only an empty window with the usual menu on top but no command prompt. When I hit enter I get three dots (like multilinecommand) but again no prompt -> nothing happens if I type any text. 
A few weeks ago the jupyter qtconsole was working perfectly fine.</p>

<p>My System:</p>

<pre><code>Windows 10 Pro
jupyter 4.1.0
qtconsole 4.2.1
</code></pre>

<p>I un- and reinstalled both with pip and Canopy. No success. I can restart the kernel with "control-." but still no prompt.
Any ideas how to get the qtconsole running in Windows?</p>