When you upgrade to NFT Collection Maker PRO, you will find the following 2 major feature upgrades inside your NFT Collection Maker App.
1. Ability to create 30 more collections.
2. 1 GB file storage via Pinata API integration.
You can check your allowed collection creation limit and see if you have 30 more collection creation limit on your NFT Collection Maker dashboard.
But the best way to confirm if your NFT Collection Maker PRO is active or not is by checking the Pinata API link inside your account.