Firefox error - Invalid Talkpal(TM) ASR license!

Invalid Talkpal(TM) ASR license! Please re-install or contact customer service for more information. This error code appears when I close my Firefox (MAC OS X). You can try to disable Talkpal addon on your firefox. If you have any idea, please let me know.

Update: Ive also tried to delete Talkpal Ax plugin, but the problem still persists.