Changing focal length setting - by: phomer60

I have an existing equipment profile set up that is working successfully. When I do an align, the astrometry software says the calculated focal length is actually 635mm instead of the 600mm it is assumed to be. I wanted to change the setting to 635mm to see if that would improve the astrometry speed. I have been unable to find any way to adjust the length that is permanent.

Can anyone explain what you need to change in order to permanently change a focal length setting for an existing profile.