In TileMaps, each tile must be a square of the same size. I don't know if those two assets would fit, you should check it out yourself if you have bought them, maybe posting a couple of screenshots so we can have a look.

What kind of map are you using? StandardMap or TileMap?

That's an explanation of how the two type of maps works...

What tools?

Technically, yes. But it depends on what you need to do. If you need random generation at runtime, it would need some changes.

Version 1.0.7 was submitted yesterday to the AssetStore.