Core Update 152 - Can't see Workgroup systems anymore

It appears that “IPFire will now always try to become the master browser for its workgroup” is preventing my Workgroup systems from seeing each other. Can I turn this feature off or must I downgrade to 151?

This hits at a very bad time as I’m trying to rebuild my son’s system which suffered a motherboard failure.

How do I determine what workgroup IPFire is in? How do I change it?