1. How do i disable the popup windows after adding one item to the cart?
It is possible with full version by changing source code
2. Is the component compatible with Joomla 3.7?
Yes, it is.
3. And does it work with php 7?
Yes, the full version works with php 7
4. consider buying the 1 year license for iprice minimart will it still work after one year?
1 year license expired after 1 year, and you need to buy license again after 1 year