Hello,
Switching themes temporarily: If you switch to another theme and later reactivate the WoodMart theme, your WoodMart settings, layouts, and design will remain intact as long as you do not delete the theme or its related data. Your design should be restored when you switch back.
Using WoodMart on a subdomain: A single WoodMart license can be used on one live website and one staging/development site for the same project. If your subdomain is being used as a staging or development environment for your main website, you can use the same license. You need to enable the Development Domain option during activation.
Best Regards