Hey Angel,
Ha, no worries at all! We totally understand that some sites are creates as multisite networks despite being a single site in practice.
If you can ignore the notice at the top of the screen asking you to upgrade, then you should be all good to go. You will still enjoy all the same functionality as any other license level.
However, if that notice is a pain, then I would consider uninstalling the plugin at the network level and instead installing it on the site level. That way, the license will only be tied to that specific network instance. 🙂
Does this help answer your question? Please let me know.
Cheers!
Geoff