Script:
Scripting > Remove a command button from an object type.
Script should look like:
True.
*** THEN ***
[???] Command button: 'Command_UpgradeGLAScorpionRocket' is removed from all objects of type 'GLAArmsDealer'.
!IMPORTANT!
After selecting the command button you want to remove, YOU MUST delete an invisible character that's at the end of the command button. To verify that this character is removed, please check if the world builder recognizes the command button.

If it recognizes the command button exists, then the character is still there, select the end of the text and press backspace.
This is how it should look like after you deleted the invisible character:

Originally Posted by: SkyMix_RMT