Won't remember rules

Yes, I’ve tried all the options available - not one is remembered.

I am not using Defense+ if that makes any difference, thought I’d try without first as I didn’t know what it was and I was busy - wish I hadn’t updated now.

Sorry but this answer - suggesting a significant change to a WinXP registry key that, in full six years of use has never been needed for any other application on my 3 systems - which is only a ‘you might find…helps’ is frankly less than satisfactory advice.
It inspires no confidence.
If Comodo cannot prioritise system compatibility between its own appplications, let alone others, then they are shooting themselves in both feet.

This problem was fixed with the 3.0.14.273 version.

Special Test edition for the users who had problems with CFP 3.0.13.268