I have a OP-1 brand new, just 1 year using here in São Paulo, Brazil.
So far so good. Awesome instrument!
I have a setup with Ableton Live, Korg Volcas, Controllers anda the Op-1.
Everything controlled by mid in/out. Ableton is the Mid Out and everything else as Midi In.
This week i’ve got this problem on OP-1 and it’s stopped starting 
Unfortunatelly i have to use WINDOWS 10, Apple here in Brazil is to expensive 
Can you help me? I love it so much! It’s so much fun!
Thanks!
Have you tried to reload the firmware? I use Windows 10 and have no issues with it showing up in Windows Explorer.
No, @ghostly606. I am afraid to lose all my presets i didn’t save on the desktop 
If it doesn’t start up then you are in no position to use your presets sadly. 
Yeah! They TE answered me and i’ll lose what i haven’t saved
Fortunatelly is not to bad because i recorded them inside Ableton 
Thanks @ghostly606 !!!