I started a new project just to be sure, just four numeric boxes, nothing else. When I cycling click over them the properties refresh after more than a second, the same as if I was with a full project with lots of screens, code, etc.. Anyways it's not an issue anymore, you get used to it, but it's a little bit annoying when you modify a lot of items as you can not set the same property at once (that would be fine).
I must say that I do like the software and the hardware, but I suppose there are still some thing that can be improved.
Sample_SMB.ulpr