From what I understand, if you pull the power from the receiver (i.e. un plug it) it will re-request the receiver.arf file from the server when it's powered up again.
_________________________
[3 rebadged Dell DARs, 1 Rio Receiver] [JReceiver 0.2.5 and tRio 0.1.6 on SuSE 9.3 Pro]