there is a little beauty bug :)
I opend some BSS-Designs at the same time. Some have some long names and the screen is full.
Every new Design is opend, but it can't be switched rest of the Designs.
The active Design can be only closed by clicking [CRTL]+[W] or the file menu
But when the 1. one is activated, the last one can not be activated before closing some visible Designs.
A little scroll button in the Design-Tabs would be helpful.
Or a new menu "windows" where all opend Designs are listed and activated by clicking.