pkg_resources.DistributionNotFound

Windows just did an update,
now when I try to open the serial monitor, I get:

Windows PowerShell
Copyright (C) 2009 Microsoft Corporation. All rights reserved.

PS C:\Users\dave\Documents\PlatformIO\Projects> pio device monitor --port COM14
Traceback (most recent call last):
File “C:\Users\dave.platformio\penv\Scripts\pio-script.py”, line 6, in
from pkg_resources import load_entry_point
File “c:\users\dave.platformio\penv\lib\site-packages\pkg_resources_init_.py”, line 3037, in
@call_aside
File "c:\users\dave.platformio\penv\lib\site-packages\pkg_resources_init
.py", line 3021, in call_aside
f(*args, **kwargs)
File "c:\users\dave.platformio\penv\lib\site-packages\pkg_resources_init
.py", line 3050, in _initialize_master_working_set
working_set = WorkingSet.build_master()
File "c:\users\dave.platformio\penv\lib\site-packages\pkg_resources_init
.py", line 657, in _build_master
return cls._build_from_requirements(requires)

File “c:\users\dave.platformio\penv\lib\site-packages\pkg_resources_init_.py”, line 670, in build_from_requirements
dists = ws.resolve(reqs, Environment())
File "c:\users\dave.platformio\penv\lib\site-packages\pkg_resources_init
.py", line 855, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The ‘platformio==3.5.1a1’ distribution was not found and is required by the application
PS C:\Users\dave\Documents\PlatformIO\Projects>

Please remove this folder and restart IDE.

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