Design Change with free version not possible

Hello, as I use the free version and added a second form to my site all formating styles are gone at both forms. As I understod the design changes are only possible in one form in the free edition. Right now I am not able to set the styling to just one form. The preview is looking good but when I save the changes no styling is published on the website. Can you please advice how to use the styler in the free version for one form? The button “Activate Style for form…” is just changing the preview but not the published form.

Thank you very much,

Best Zim