Actually, PCM is still showing v1.0.0
Anyway, I got v1.0.2 installed, it is having the same issue of disallowing KiCAD to exit cleanly.
C:\Users\elekgeek\Documents\KiCad\6.0>pip install kikit
Defaulting to user installation because normal site-packages is not writeable
Collecting kikit
Using cached KiKit-1.0.2-py3-none-any.whl (206 kB)
Requirement already satisfied: click>=7.1 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from kikit) (8.0.3)
Requirement already satisfied: solidpython>=1.1.2 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from kikit) (1.1.2)
Requirement already satisfied: numpy>=1.21 in c:\program files\kicad\6.0\bin\lib\site-packages (from kikit) (1.22.1)
Requirement already satisfied: pybars3>=0.9 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from kikit) (0.9.7)
Requirement already satisfied: shapely>=1.7 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from kikit) (1.8.0)
Requirement already satisfied: pcbnewTransition==0.2.0 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from kikit) (0.2.0)
Requirement already satisfied: markdown2>=2.4 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from kikit) (2.4.2)
Requirement already satisfied: commentjson>=0.9 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from kikit) (0.9.0)
Requirement already satisfied: colorama in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from click>=7.1->kikit) (0.4.4)
Requirement already satisfied: lark-parser<0.8.0,>=0.7.1 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from commentjson>=0.9->kikit) (0.7.8)
Requirement already satisfied: PyMeta3>=0.5.1 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from pybars3>=0.9->kikit) (0.5.1)
Requirement already satisfied: euclid3<0.2.0,>=0.1.0 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from solidpython>=1.1.2->kikit) (0.1)
Requirement already satisfied: pypng<0.0.20,>=0.0.19 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from solidpython>=1.1.2->kikit) (0.0.19)
Requirement already satisfied: PrettyTable==0.7.2 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from solidpython>=1.1.2->kikit) (0.7.2)
Requirement already satisfied: ply<4.0,>=3.11 in c:\users\elekgeek\documents\kicad\6.0\3rdparty\python39\site-packages (from solidpython>=1.1.2->kikit) (3.11)
Installing collected packages: kikit
Successfully installed kikit-1.0.2

I also got this message while executing kikit-plugin.exe enable --all

Once I remove this plugin (v1.0.2) KiCAD exists OK i.e. no longer seen in the task manager, Win10, so issue doesn’t seem to be resolved, unless I am missing sth, current KiCAD version is 6.0.1.