[spyder] Spyder is not starting (Windows 7, Anaconda3-2019.10-Windows-x86_64)

[RS]

I'm using an old version of Anaconda (Anaconda3-2019.10-Windows-x86_64 on 
Windows 7 Pro)

It was running fine until recently when it stopped working.

Whenever I try to run it crashes, issuing the following error. I've removed 
and  reinstalled Anaconda (using ReVO uninstaller) a number of times  and 
reset Spyder using "spyder --reset" command but nothing helped. 


(base) PS C:\Windows\system32> spyder
Traceback (most recent call last):
  File 
"C:\ProgramData\Anaconda3\lib\site-packages\spyder\app\mainwindow.py", li
ne 3285, in main
    mainwindow = run_spyder(app, options, args)
  File 
"C:\ProgramData\Anaconda3\lib\site-packages\spyder\app\mainwindow.py", li
ne 3140, in run_spyder
    main.setup()
  File 
"C:\ProgramData\Anaconda3\lib\site-packages\spyder\app\mainwindow.py", li
ne 831, in setup
    from spyder.plugins.help import Help
  File "C:\ProgramData\Anaconda3\lib\site-packages\spyder\plugins\help.py", 
line
 32, in <module>
    from spyder.utils.help.sphinxify import (CSS_PATH, generate_context,
  File 
"C:\ProgramData\Anaconda3\lib\site-packages\spyder\utils\help\sphinxify.p
y", line 32, in <module>
    from sphinx.application import Sphinx
  File "C:\ProgramData\Anaconda3\lib\site-packages\sphinx\application.py", 
line
34, in <module>
    from sphinx.highlighting import lexer_classes, lexers
  File "C:\ProgramData\Anaconda3\lib\site-packages\sphinx\highlighting.py", 
line
 27, in <module>
    from sphinx.ext import doctest
  File "C:\ProgramData\Anaconda3\lib\site-packages\sphinx\ext\doctest.py", 
line
28, in <module>
    from sphinx.builders import Builder
  File 
"C:\ProgramData\Anaconda3\lib\site-packages\sphinx\builders\__init__.py",
 line 24, in <module>
    from sphinx.io import read_doc
  File "C:\ProgramData\Anaconda3\lib\site-packages\sphinx\io.py", line 33, 
in <m
odule>
    from sphinx.util.rst import append_epilog, docinfo_re, prepend_prolog
  File "C:\ProgramData\Anaconda3\lib\site-packages\sphinx\util\rst.py", 
line 22,
 in <module>
    from jinja2 import environmentfilter
ImportError: cannot import name 'environmentfilter' from 'jinja2' 
(C:\Users\SRay
\AppData\Roaming\Python\Python37\site-packages\jinja2\__init__.py)
(base) PS C:\Windows\system32>

Thanks in advance

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