What's the license on this? Commercial? Derivatives? Redistribution? In your interior tileset bundle, the following was said:
"I dont know a lot about licenses but as long you dont resell or redistribute it you can edit and use it as you like for as many projects as you'd like."
"Can I use this resource for commercial games?"
"Yes, you can!"
Please take a look at the Creative Commons licenses. I'm sure you can find one you are happy with