There is indeed a license file included within the paid version of Modern Interiors, however you can also see the license within this page under the license section, but I'll also paste it here so you can read it:
Complete version LICENSE (paying at least 1.50$): YOU CAN:
- Edit and use the asset in any commercial or non commercial project -Use the asset in any commercial or non commercial project
YOU CAN'T:
- Resell or distribute the asset to others
- Edit and resell the asset to others
-
- Credits required (this link)