GRE Firmware

mzfb@...
 

I need to update the firmware in my PSR500 & 600 scanner. can someone give a step by step procedure to update the firmware?  My PSR500 has the following
Up App1 U1.8
DSP APP U1.4
DSP APP F1.0

I never update the this scanner since purchasing it.

Thanks in advance
Mike

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