Hhhmm, this should work. Don’t you see a small menu appear when you click on an area? When you click in the i-icon you should see a bigger menu with all the textures.

I had this problem. Sometime Floorplanner gets confused when you create smaller rooms within a bigger room. What you have to do is delete some walls until you can colour the floor and then re-create the walls

I don’t see colouring the floors either…I didn’t want to take down my walls it’s way to much work..haha