I observed a bug in Jeti Studio V1.1.5. If you choose "Update transmitter" and click next until the firmware selection listbox, please use the "back" button until you are back in the main menu. After these steps please select "backup transmitter" and check "Audio" files additionaly, the backup written to the zip file will be incomplete. If I go straight forward after a restart of Jeti Studio to the backup menu, the backup will be complete with checked audio folder.
I tested this several times with the same result of an incomplete backup. Nothing special because the most users might use the gui straight forward, but it shouldn´t behave like this.