I am having trouble modifying any "link to URL" actions (navigation and branching). They seem to disappear when I go in to view them under the "actions" tab in the sidebar. I'm also finding that the link that I indicate in the action settings doesn't work all of the time. I would prefer the links to be "modal" but they don't always work this way, and I have to get it to open in a new window (which isn't ideal for my purposes).
Any suggestions are appreciated!