1. Add new product or edit existing one in 'Agreements & Offers>Extras' in Nitesoft, like this.
To make the product available in the Nitesoft Cashier the Kiosk Type has to be selected.
Select it like this. If Kitchen is marked the product will also show up Kitchen printouts.
2. Go to Nitesoft Cashier select "Functions>Nitesoft Synchronization" click Synchronize.
3. After successful synchronization restart Nitesoft Cashier, updates should now be imported.