Logi Options + total removal

I have had a MX keys for about 18 months, two of the keys are now loose and it's pretty much useless, they don't offer any service or sell spare parts.
So I need to change keyboards, I bought a new keyboard (not a Logitech) and I need to swap the command and control keys. Yes I am a PC to Mac convert 5 years ago but the 20+ years PC muscle memory wants that command key on the left at the end).
It will not do this in the usual Mac settings nor with any of the apps I have tried.
I have deleted every trace I could find of the Logi Options + software and yet I still feel it's in contro, if I use the MX keyboard all the changes I made remain live (the command and control keys are still swapped as I set them up to be with the Logi Options+ when I first got it).
Does anyone have any useful thoughts on this or suggestions about the complete removal of the Logi software?