I've just installed the website app. I went through the questions and the automatic website builder made me a website. 

I now want to change the theme they suggested me. If I click on change theme in the editor, I get to see a lot of different themes. I select one that suits me more, but it looks like it didn't change in the editor. Only some colours. 

Is there a way to reset the first input and start again from scratch? Or to avoid the AI builder and just choose the theme I want?