I recall Paul posting the release of 1.31 in the announcements section when I was reading the thread at work. Now that I'm at home (where the Teensy stuff is installed), I don't see that thread any more in the announcements section. The normal link for downloads: http://www.pjrc.com/teensy/td_download.html works and it points to Teensydunio 1.31.

I'm sure Paul already has this on the list, but one of the features of 1.31 is adding support for the two DAC's of the 3.5/3.6 (AudioOutputAnalogStereo) and also AudioInputAnalogStereo. The Audio Design Tool doesn't seem to have added support for these (http://www.pjrc.com/teensy/gui/).