HI Luca
a) your unit internal battery should be replaced.
b) It's ok that a new OS requests updating an user preset to the latest software. Preset 2120 shows the same noise problem here too. We have fixed many of them…but this one was too smart! Thanks for the finding.
Conversion of presets to a newer OS doesn't imply the existence of new modules. This system has some new modules in it though, particularly because of the TF/MF presets. Details about the new modules will only be available with next Vsig Help release. Right now you could only download the unit database and check the new modules in Vsigfile programming area.
al the best
I
