This firmware version is still in beta stage.
Click this link to get the beta firmware
Notes from the Elecraft web site
* PSK63 FIX: DSP revision 1.49 corrects a problem with PSK63 mode.
* ALT MD MENU ENTRY IMPROVEMENT: Some users found that the ALT MD menu entry didn’t switch modes consistently or cleanly. This is a long operation internally to the firmware, so the VFO A knob rate was slowed down (parameter adjust).
Meanwhile, do not forget to follow me on Twitter @VA2SS, subscribe to my blog and my YouTube channel as well.
Have fun and stay tuned!
Jeff | VA2SS