Try this close Mastercam rename this file "C:\Users\**** your user name here ***\Documents\My Mastercam 2020\Mastercam\CONFIG\Mastercam.Workspace" to old_Mastercam.Workspace or something like that launch Mastercam it will create a new default copy of Mastercam.Workspace see if functionality is restored if  it is close Mastercam, delete the new Mastercam.Workspace file and restore the name of your WorkSpace file. See if you still have full functio
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