ok resetting the virus solved my problem:
1. Disconnect the USB cable from the TI
2. Disconnect the power cable from the TI
3. Reconnect the power cable to the power outlet
4. Reconnect the USB cable to the TI
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actually, I did not need to go into the next step, but just in case:
5. Press and hold the ARP EDIT button for a few seconds (10?) and then let go