Will the system notify me before updating the existing inventory?

Will the system notify me before updating the existing inventory?

Yes, the system will notify you before updating the existing count of inventory. You will see a notification pop up asking you to confirm if you would like to update the current inventory. You can click Yes to update the inventory. 
Plugins in Tagrain are either Subscription Based or License Based. So the price that you pay for your plugins is based on the number of POS terminals that you have in your setup and the number of licences that you have acquired.