Good plugin but annoying disabled input textboxes on settings page

This is a good preloader plugin but it includes functions that are disabled on the settings page. Specifically the preloader width and height. The input is there but it is disabled. It can be enabled by upgrading to the paid pro version.

I think this runs afoul of the plugin guidelines of WordPress. Specifically #5:

“Plugins may not contain functionality that is restricted or locked, only to be made available by payment or upgrade.”

https://developer.www.ads-software.com/plugins/wordpress-org/detailed-plugin-guidelines/