Anyway, for the record: I installed the new version over the old 184.108.40.206. The only thing I did was restarting PiServiceLauncher manually after that. Did not see any problem apart from the wrong default language. The brightness and contrast were ok.
But, right after turning on the headset PiTool started FW update! This has been reported right from the beginning as very risky operation. I assume there is no FW update from .129 to .132, but if this behavior is not fixed I expect at the next update we will again have people stuck in DFU mode because they (involuntarily) executed FW update in a bad moment.
@PimaxUSA, @SweViver could you explain to the devs that this not safe and should be left to the user to decide when to apply FW update?