Page Header image chopped off top and bottom

I use Catch Adaptive Free, and for some of the pages of my site I've chosen to change the Header Image, using the "Header Featured Imagine Options" at the bottom of the edit page. On my Windows 10 laptop, with Chrome or Edge browsers, the alternate header image is lopped off at the top and bottom, while on a Windows Surface tablet it displays the full image exactly as I expected. This alternate image was designed in the proportions specified in the "Header Image" selection (1680 x 720 shown as desired; my image is 1575 X 675). My site address is davislibraryfriends.org, but the pages I'm concerned about aren't yet linked from there. The troublesome pages can be seen at davislibraryfriends.org/davisjuneteenth Desperately would like this to display correctly on all computers! Because we're a non-profit, upgrading from the free version isn't a possibility. Thanks!