@ Mike OK with COM13 (in place of com13) but now flash could not open file AudioMoth.bin As you can see on the picture, I try first with AudioMoth1.2.1.bin then I simplified the name (AudioMoth.bin) and finally I change the properties to give full access to the system (last line) but always "could not open file" Idem on Win PowerShell... I found the solution with a friend: you must be in the directory. So, first CD c:\flash and then all the rest is ok.

@ Mike When I plug audiomoth with paper clip in place, Flash detect COM13 but when I run flash with "-u flag" it doesn't work (could not find port)

@Mike Under Win10, Win Powershell or Cmd prompt could not find any serial port with flash.exe...