AIR: "Forget Device"

[Mohmm]

Sorry for this inquiry that is caused by a mistake on my part: In AIR.app preferences when you right-click on a source (WLAN or Ethernet), there is a small window allowing to "forget device". By mistake I came over this window and somehow clicked the "forget" for my AIR ethernet and no uninstall and re-install makes the ethernet source visible again.

Stupid, I know, but a problem nevertheless.

How to make Dev ethernet appear again?