[sdrawkcab]

I hadn't used Calibre for a while but now it won't open.
Windows 10
6.27.0

A background process appears every time I try to run it.

calibre-debug -g outputs thusly:

calibre 6.27 embedded-python: True
Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19045')
Python 3.10.1
Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free')
Interface language: None

I've run as admin, uninstalled/reinstalled but still the same.