Unable to locate the Toolbox on the screen.
The toolbox is only available when a plot or layout window is active. If you don’t see it, the toolbox may have been moved to one of the screen edges. If all else fails, renaming the default KG Style file would force the program to use it’s internal defaults and get the toolbox back in its normal position.
To access the KG Style file in the Windows version, you will need to turn on the setting in the Folder and Search options (under the Organize menu in the Windows Explorer window) to Show hidden files to access hidden locations. There should be a KGStyle file in the Users\(user)\AppData\Local\VirtualStore\Program Files\KaleidaGraph directory. (user) in the previous path is the name of your account on the computer.