You can now add an extra store through the POS. In order to do so, you will need to do the following:
1. Go to Settings > Admin > Multi Store
2. Once you are on the Multi Store section, in the top right hand corner, select 'Add Store'
3. On the pop up, you will be able to define all relevant details, such as store name, plan type and any customer or product information you would like to copy or link across to your new store. You can also copy over any existing settings from any of your stores to your new one.