Question about downloading skp models on free web version

Newbie here. Learning free web version. Want to download a model from the 3D warehouse to my computer as an SKP file. I use it in conjunction with another software render program. I get a message saying I need to update my version of Sketchup to 2019. I have done that, still get same error message. What do I need to do to get an SKP file to download to my computer? I’m not even sure which version of Sketchup I have. I just signed up about 2 months ago, if that helps.

I see you use the free web version. From within the program you should be able to get models from 3D Warehouse. Search for the icon on the right side on screen.