Match is a feature of Learn mode in the Nrio Device Manager, and is similar to device match available in the device manager view of some other drivers.
The following image shows a match about to be initiated between a discovered Nrio16Module and an offline-created Nrio16Module.

Following the match, the NrioModule uses the Uid and automatically-assigned Address of the selected discovered device, and its fault status is cleared. In the Discovered pane, the associated device becomes unavailable for selection (dimmed).