Hi,
The firmware can be upgraded, but only at the factory, you will need to send it back to germany, cost is about 10 euro.
the beeps can be turned off using one of the settings in the software, if yours has been turned off you can do a factory re-set.
i have a gm120 but with the 7.2 software, so setup is a bit different.
the 1.3.6 genius tool can be set up for 7.2 or the older 4.x software by using the version tab.
there is a very good GM thread on the rctech forum.
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