To open a landing page in the editor, click on Landing Pages from the left menu, and then then click on Open in Editor icon from the actions list.
In case the landing page was imported from an URL, .zip or from Adplexity, then the first time you will be prompted with a link replacement message. This allows you to quickly replace all outgoing links on your landing page in bulk, and point them to your own offer or campaign link.
Don't Replace links - This (default) action won't replace any links on your landing page
Replace with Empty Links - This action will replace all outgoing links with #
Replace with Specific URL - This action will replace all outgoing links with the URL you want to use as a replacement (ie. your tracker campaign url, or product url)