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Disable Multi-Monitor functionality in User_ref / Usersettings is not working

How do I disable the multi-monitor functionality?

The following with what I have in my Usersettings script:

'===================================
' Multi-Monitor INITIALIZATION
'
' Note: You can ignore this section for single monitor systems (i.e. multi-monitor
' functions will already be disabled).
'
' To disable multi-monitor functionality when using dual-monitor or quad-monitor
' hardware, uncomment the following line. This results in DeltaV Operate opening
' pictures only on one monitor. Only one toolbar, alarm banner, and main picture
' appear. You can still use the other monitors for other applications.
'
frsVariables.gn_mh_disabled.currentvalue = 1
'
'===================================

This workstation had previously only had 2 monitors on it, but we recently added a third monitor. This change has since caused errors to appear stating that we do not have the correct licenses. To be clear, I only want one of the monitors to show the DeltaV operator / process screens. The other two monitors are for process trends or internal web resources.

This problem is occurring on two of our machines both are running 12.3.1 on Windows 7.

Thank you all for your help.

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