title: Anaconda/Orange3 produces OSError: [WinError 193] %1 is not a valid Win32 application
body: <p>When I try to launch Orange 3 under Windows 10 in Anaconda I get the
  following error:</p>
  
  <pre><code>Traceback (most recent call last):
  File "C:\Users\i7\Anaconda3\Scripts\orange-canvas-script.py", line 6, in 
  from Orange.canvas.__main__ import main
  File "C:\Users\i7\Anaconda3\lib\site-packages\Orange\__init__.py", line 5, in 
  from Orange.data import _variable
  File "C:\Users\i7\Anaconda3\lib\site-packages\Orange\data\__init__.py", line 4, in 
  from .variable import *
  File "C:\Users\i7\Anaconda3\lib\site-packages\Orange\data\variable.py", line 9, in 
  import numpy as np
  File "C:\Users\i7\AppData\Roaming\Python\Python37\site-packages\numpy\__init__.py", line 142, in 
  from . import core
  File "C:\Users\i7\AppData\Roaming\Python\Python37\site-packages\numpy\core\__init__.py", line 23, in 
  WinDLL(os.path.abspath(filename))
  File "C:\Users\i7\Anaconda3\lib\ctypes\__init__.py", line 364, in __init__
  self._handle = _dlopen(self._name, mode)
  OSError: [WinError 193] %1 is not a valid Win32 application
  </code></pre>
  
  <p>I get the same exact error mesage when I try to start it from the
  Anaconda command line with</p>
  
  <pre><code>(base) C:\Users\i7&gt;python -m Orange.canvas
  </code></pre>
  
  <p><strong>Fresh install of Anaconda and Orange 3 (3.23.1) via Navigator (1.9.7) today</strong>,
  and Windows 10  Ver. 1903. The only thing I changed in the Anaconda
  setup is to install Orange 3.</p>
  
  <p>Any ideas what might be going on? Based on searches I'm suspecting a
  mismatch of 64 vs 32 bit DLL (maybe?) .. but not sure how to
  proceed. Plus the whole idea of using something like Anaconda is (to
  me anyway) to avoid these sort of problems.</p>
  
  <p>I'm totally new to Orange, if there's a better place to ask for help, please let me know and I'll post this there.</p>