I have just installed your opc extension for "virtuemart ajax sedarch pro" using the OPC Extensions installer, I am trying to place some of the search priorities into unused but everytime I save the module they do not stay in "unused" and return into used.
Is this a bug or a configuration issue...
I use php 5.4.45 ( have tested up to 7 no luck)
Joomla 3.6.4
VM 3.0.18
OPC 2.0.322.151116
Thanks