I'm checking your FAQ from http://support.presonus.com/hc/en-us/articles/210046863 to "how to reset your mixer....'
From your screenshot below
From the last UC v188.8.131.52497 i've got a different screenshot without the menu "Settings - Factory Reset".
If it's not possible to reset via the Software, do you have a procedure manually from the mixer ?
I dowloaded the last UC for my MAC and Windows.
Thanks for your help.