I can - clearly you can't...
This is one case in which your obviously highly active imagination has failed you. No, they weren't. The instruction sheet that comes with the unit makes no mention whatsoever of temperature. The piece which you mention is on a separate data sheet and says as follows:
Um die maximale Wirkung des Gerätes zu erhalten, emphehlen ([sic] - they mean "empfehlen") wir, den Raum-Audio-Animator einmal in Monat für einzige Stunden im Kühlschrank zu verwahren
Optimale Temperatur ist +3° vis +8° Celsius. Setzen Sie den Raum-Audio-Animator auf keinen tieferen temperaturaus, da das Gerät sonst Schaden nimmt
(In order to achieve the best effect from the device, we recommend that you put the Animator once a month in the fridge for a few hours.
The optimal temperature is between 3° and 8°C - don't do it at lower temperatures, or you could damage the unit).
In other words, it does NOT mean in English
It is an occasional measure and that only for the "best effect", not to make it work. Small wonder the Swiss dealer never mentioned it. OK, this is perhaps a failure on the part of the manufacturer to put this on the instruction sheet, but this clearly reflects that this is not of vital importance. Moreover, it has nothing to do with activation/reactivation, and it is not required to start the unit.
In other words, Pete, you have just completely exposed yourself as a humbug - and, despite your protestations to the contrary, as a major teller of porkies. You accuse others of distorting things, while you furiously (and clearly deliberately) distort and twist things as hard as you can go if they're not in accordance with your particular desires and expectations. You have just proved to all the world that you are totally untrustworthy. I for one shall henceforth ignore totally everything you say.