I went to the device manager and looked into the usb composite controllers (details -> drop down menu "properties: hardware-IDs"). One was my mic (no name, but the values were the same as in the provided pdf), it had VID: 17A0 and PID: 0310 (so different from the ones in the word file). I entered them in those boxes down there in the provided programm execution, following the word file instructions, and connected. Then the mic was found (also in the top boxes, the device was mentionend now). However, a firmware was obviously still on it, as the "EEPROM not found" message did not come up. I then followed the video tutorial and uploaded the provided firmware file. However, nothing changed (maybe it did, but I only checked for the LED which still was red when re-plugging again). I therefore thought, it does not work, and this time after connecting with my VID and PID numbers, erased the firmware.