Markoz wrote on Apr 7^th, 2024 at 3:10am:

To deactivate P3Dv4 and P3Dv5 just uninstall them. You don't need to deactivate FSX (but you could uninstall it anyway (see my note at the bottom of the post)). I recommend that you uninstall all Captain Sim products because some, if not all for P3Dv4/v5 need to be deactivated. You use the ACE to deactivate them. I know it's a PITA, but it was better to be sure than sorry. Note. If the new motherboard is a different type to the old one (including getting a new Chipset and CPU), I'm sure you will need to do a reinstall.

There is no way to disactivate CS from P3Dv4 and P3Dv5 via ACE which only works to add\remove liveries only.
I will uninstall CS via Windows Control Panel. I hope all go fine.
Pat