Dear Sir! I have been using Thunderbird mail client for years, but now I would like to change the notification sound of incoming emails. I have found the setting for this and have saved an MP3 sound of my choice. However, there was no "save" button. I then thought it would automatically save the sound of my choice, but it didn't. The default sound still plays when incoming emails arrive. Please help me so I can change the sound. Thank you Best regards: Mrs. Zoltan Kiszely