Hi! You can find it where the D5 installation folder is stored, then please check D5 Render\d5_immerse\Content\demo, in “demo”, you will find the demo scene file.
But if you have changed the save path, please find the “demo” folder in the new location.
And if you want to keep some assets in the demo scene, you can select them and click “Add to Local”, then the next time in a new project, you can find them in “Local Assets”.
Please note that the demo scenes are for you to get familiar with all the features in D5.