To export/download the HTML version of your page in order to use it anywhere or host it on your own hosting, just go to your campaign view screen , then, choose your page and click on “Publish” > “Download HTML Page”, and the page will be exported and downloaded to your computer.
PS : After hosting your page anywhere you want, you can still modify its design from your Capture dashboard and the page will auto-update without the need to re-download the HTML version again.