As showed in the img my presets are disappeared for some time now, and i don’t know how to restore them… i’ve already restored the op-1 to factory settings and re-installed last update but nothing seems change… Please any idea is welcome ;(
I’m guessing you’re pressing Shift & 1 (the large one on the left) instead of one of the small 1-8 numbers to the right? You can confirm this by looking at the Sampler category which would still have some presets in it. Also the “user” category would be missing in that mode.
… You’re right. Thank you very much bro 
Ok. Is that the way to use a preset with a different engine ? I’ll have to try that tonight…