I created hot keys for some brushes that I use in Zbrush. I would like to reset them to the default settings, how can I do this??
preferences>hotkeys>restore
I tried to do that but the Restore button is frozen 
this is the default hotkey settings. you can paste this into a text editor, save as Hotkeys.TXT (or any name), then load it from preferences>load
//ZBrush Hotkeys
[BRUSH:MORE ITEMS,98] // B
[BRUSH:STANDARD,5447796] // Popup+T
[BRUSH:SMOOTH STRONGER,5447795] // Popup+S
[BRUSH:MOVE ELASTIC,5054565] // Popup+E
[BRUSH:MPOLISH,7151728] // Popup+P
[BRUSH:CLIPCURVE,4399203] // Popup+C
[BRUSH:CLAYLINE,4399212] // Popup+L