Paratext 10 Studio beta 1 does not yet have a smooth way to create projects from zip files or to import projects from Paratext 9. That will come with later versions.
In beta 1, you need to find where Paratext 10 studio stores its projects. On my computer it is in c:\Users\username\.paratext-10-studio\projects\Paratext 9 projects"
Once you find that folder, you can copy the project folder from your Paratext 9 settings folder (usually c:\My Paratext 9 Projects) into it. Then when you start Paratext 10, you should see this project in the "open" list.