Thanks so much! I'm sad to see the locked rooms go myself... it's a simple set-up with an inherent impossibility to it that really isn't that impossible at all because there are so many angles you can create a solution from -- which is very convenient for me! Yeah I don't know what's causing the issue (basically when I try to click on a window, it just crashes). But it's CS5 and I'm running Mojave on my Mac, so that may be an issue... I also think it's likely due to this computer running out of RAM, so getting an upgrade is something I'm currently weighing the pros and cons of. :)