To create a circular room please follow the below steps:
1. Create a new room.
2. Cancel the wall wizard that appears.
3. Go to Insert Catalogue Items Item Name: type in *Wall.
4. Choose either *WALL45 or *WALL90.
5. When adding to your room, make sure the length and depth are the same size.
This will make sure the shape is maintained.
6. Press enter to add the first wall.
7. Press enter another 3 times until the circle is complete.