I just used one of the pizmidi utilities and found it threw an error message saying it had an installation issue (see image).
There is no installation, just make a directory and put them all there.
Turns out an option needs to be modified now that was not needed before. I don't know if this is new or old, I don't use these very much. Anyway the fix is simple.
In the vst folder there is a file 'pizmidi.ini'. Make the following change (in red):