It used to be that you had the tool tips on the tool bar.
So when you worked with the color editor, you could go back to the regular tool tip.
In Windows I have to click and hold the shortcut button on the toolbar for the options to come flying out (see attachment). Are all tool shortcuts missing or just this one?
They are gone, and I'm stuck with the color editor tool tip. Cannot find them in the menu.
And Keyboard Shortcut keys, do they work? 'W' allows me to select the WhiteBalance picker. Does the "View|Customize toolbar" menu item allow you to restore tools that are missing? Maybe you clicked hide toolbar?
Also: why does double clicking into the image no longer zoom in?
No idea, maybe something got corrupted?
Have you tried disabling hardware acceleration, reinstalling?
The number of issues you seem to have suggests something is wrong at your end. Hardware issue, virus-scanner running amok?
Cheers,
Bart