Saved renders not showing up..

Newbie here. Every time I open sketchup my saved setups are gone and I have to create a new one. I now have 8 skaters in the render list… but when I click on them they are all empty… no settings(default, and grass is gone). I’m also not sure what the dropdown is for in the render list… it looks like its a list of all my layers/tabs in sketchup. I watched the video tutorials but I did not notice anything about the render list. Can someone point me to a video or manual that walks me thru this whole render list thing? Thank you!

Did you click on ReGenerate after you’ve changed the settings of the setups when you created them?

You can find more information about the Render List in the online manual: