- F5 is the out of the box keyboard shortcut to show/hide the selection filter...
- Did SW crash on the 1 million and 1 assembly? That can sometimes cause errors in your registry (which is where SW stores your settings, including the toolbar placements and visibility).
It sounds as if it's a moot point but I would bring up that the toolbars can also be set within the individual template files. If it's a random on/off thing I would not think this would be the case but I mention it just to cover all bases.
E.g.: You can have different toolbar sets for .sldprt, .sldasm & .slddrw.
I think I have the solution. Close SW. Open Regedit and find this key and rename it:
You'll lose all your customizations to system options.