2) On that screen, you should see a whole long list of your existing Landing Pages
3) Right click on the blue bar that has your headers, choose "Columns" and check off "Page URL"
4) Export using the Export feature on the bottom
It's a little limiting since it only lives here. It definitely would be helpful to have this in the Analytics section and under the Landing Page Performance report but for now, you can at least get all of your links.