You need not transfer any content of your website, they are always there no matter what theme you use. The appearance will change and you have to customize again.I'd like to change my theme back, however, I encountered several errors when doing so.
So I think going with a fresh install might be the best, but how do transfer my existing products?
You need to adjust things in "WP-Admin>Appearance>Customize" like @Mar mentioned ... and "Menus>Manage Locations", which I'm betting is one of the main "errors" you refer to.I encountered several errors when doing so.
Try deactivating the Alidropship Woo plugin, then activating it again.some products the images are nog recognizer anymore.