Yes, you can work on multiple website projects in Ewisoft Website Builder. Each website is saved as a project with it's own files and folders. You can also create a backup file for each of your website projects as an additional safety measure. There is no limit to how many websites you can work on.
When you open Ewisoft Website Builder, the last project you worked on will be highlighted.
To open another website select Browse an existing website project and click OK.