EVOLVE windows do not display
If one or more of the EVOLVE dockable windows, such as; Family Browser, Find Elements, Element Filter, etc, appear to not display when toggled on/off, this is typically caused be the windows bring reduced down to a small size and then hidden behind other active windows.
The best solution is to reset the Revit UI, which will in return reset the EVOLVE UI and will bring back all window interfaces to a default visible state.
Click HERE for more information.