Double click on any parameter to type in a new value .
While the edit field  has turned black to enter a new value  , right click and select delete or cut 
While right clicking to bring up the delete menu , make  sure that the mouse cursor is still in the empty parameter field ( so it remains blackand waiting for data input ) 
Reaktor will crash , both standalone and vst 
This does not happen in reaktor core because a right clickimmediately  turns a   module back to grey ,(so non editable )  
Why is there no dedicated bug forum ???
    
        
             
    
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