Thanks for coming back so quickly Greg - I am on Cura 5.6.0 atm so that post-processor doesn't show... yet.
Your app on my screen looks like:
The "Print the file" button does as it's name suggests, but I don't see the button "Add Cooling profile to a GCode File" - as your previous post shows?
I'm happy to wait for Cura 5.7 but was keen to play with the cooling...
Thanks again