Your full commercial licence.
Your licence covers the commercial rights WaveQuake can grant in your lawfully obtained outputs. As between you and WaveQuake, you own the rights in outputs to the extent those rights exist and can belong to you.
You may edit, publish, sell and license your outputs lawfully. There is no separate commercial-use upgrade or WaveQuake royalty share. This permission survives account closure; download your files while you have access. It does not create copyright or grant rights belonging to someone else.
Output rights in the terms