I updated to v15 last night and was playing it for awhile without issue. Then I decided to try some of the new factory UR cabs. Again, I played through some without issue. Then, I landed on the Triptik cab and tried it for a few seconds then scrolled off and the axe locked up (no more sound, front panel / MFC buttons not responsive). I restarted the axe and tried again. I scrolled through some of the cabs and it locked up again on the Triptik cab (I wasn't trying to stop on it, just scrolling somewhat fast through the cabs).
Model: Axe Fx II (Mark I)
Input Method: front panel
MFC Connected: Yes
USB Connected: Yes (windows 8.1)
USB Driver: latest (NOT beta)
Fractal Bot / Axe Edit Connected: No
CPU Usage (I checked that preset after I rebooted): 71%
Amp: Model: Tucana 3
Model: Axe Fx II (Mark I)
Input Method: front panel
MFC Connected: Yes
USB Connected: Yes (windows 8.1)
USB Driver: latest (NOT beta)
Fractal Bot / Axe Edit Connected: No
CPU Usage (I checked that preset after I rebooted): 71%
Amp: Model: Tucana 3