OPC Plugin is avaiable in the following path : 
"C:\Program Files\Hexagon\EdgeFrontier\PluginSDK\OPC UA Client Plugin" or
"C:\Program Files(x86)\Hexagon\EdgeFrontier\PluginSDK\OPC UA Client Plugin" 


Please copy all the OPC UA Plugin related dlls to "C:\ProgramData\Hexagon\EdgeFrontier\Engine\Temp\bin"
