There is the firmware notes revision :
Information 2.84 / DSP 1.52 SW TONE SETTING BUG FIX
Corrected a problem that prevented Morse audio tones from being turned off once turned on using the SW TONE menu entry
The firmware is now available by using the Elecraft software utility.
Meanwhile, do not forget to follow me on Twitter @VA2SS, and subscribe to my blog and my YouTube channel as well.
Have fun and stay tuned!
de Jeff | VA2SS