You can modify the theme file in the generated application by opening it from the generated "resources/initializr/css" folder ... But if you modify the CSS in that folder, it will get overwritten if you regenerate the application and your changes will be lost.
So, here is a tip for not loosing your CSS changes when regenerating the files: Open the folder where AppGini is installed (usually C:\Program Files\AppGini or C:\Program Files (x86)\AppGini), then open the subfolder "add-ons\themes" ... Now make a copy of the CSS file you are using as a theme, and rename it to some other name (e.g. "my-cyborg.css"), and make the desired changes in it. The new file will now become a theme available for you to select in AppGini from the themes window. You can use it in any other future project and your changes in it are not overwritten.
