Hi Tim
I had the same as hans, ok with chrome, gobbledygook with firefox.
Couple of things i will mention though which i hope you wont take harshly
1/ it seemed strange to me that interior and exterior walls are all the same thickness
2/ you might find it easier to let the programme crate your rooms automatically, once your walls and doors are in position select the "create room" icon then double click inside your walls
3/ with regard to the walls, if you select a wall then click near the end of it, it will straighten itself
Having done so much good work recreating your home, seems a shame to let these simple actions detract from what you have achieved.
Nice one
Mike
