What are the steps to use a project file after we download it?

What are the steps to use a project file after we download it?

Both .arproj and *.arexport can be open with Spark AR Studio. Just double-click on the file or use the open-with function (windows)

As exrecefe mentioned, you’ll generally either get a folder containing the assets and the .arproj or simly an .arexport file, which you can save to recreate the assets folder + .arproj structure.