You can use Editorify with multiple stores,
You need to install the app on both stores and subscribe separately to each store.
To switch between accounts, you need to log in to your Shopify admin dashboard (shop you want to use), go to apps and click the Editorify app.
You'll get redirected to the Editorify dashboard, and it will be linked to the current store you're using.
Now you can start import reviews to this store.