To go into Live Mode, we need to verify your account. Need help: How do I create a Lemon Way for E-commerce account?
Once your account is verified you only have to:
1. Put your payment module in Live Mode in Prestashop 1.7 by clicking on "No" on "Test Mode?" and click on "Save" in order to save your modification.
2. Put your Lemon Way for E-commerce management module in Live Mode.