New firmware

[Johnnydev]

I did google it, but it seems to have three different versions, I don't know which one is correct.
Method 1: Quick click back button tree times.
Method 2: Quick click back button five times.
Method 3: Long press back button for 10 seconds.

Thank you!

Haha, yes, it's a bit confusing with different generations of info out there.  The short answer is (3).  Scroll to the very bottom of this page and you'll find an example of the "Sound Design" you will get upon a successful reset (takes less than 10 seconds on mine).

Yes (3) is the goal. By me also less then 10 seconds) after about 1or2 seconds you get a sound and then a few seconds later another sound en then it’s done