Advise: Learn about and read software licenses when they are presented to you.
Construct's license is independent from the assets license. That's why in the licensing terms of the store Construct's licenses have their own chapter and assets do have a different one.
Moreover on each asset's page there is a "License" tab that clearly defines what you are allowed to do and not to do with the assets.
Finally the choice you found yourself with about the use of the assets (Use within a business organisation, personal use only, a gift ,anything else) has again nothing to do with C2's license itself but is just about the nature of your payment.
If you are a business you may access invoice and VAT related stuff by selecting "Use within a business organisation".