I'm so frustrated i'm on the verge of quitting making music because I just recently spent three days trying to backup data that was on my old HD image, and now the new OS doesn't recognize my .ksd presets. KORE2 was working for a few days in Live, and my backup images were working just fine and now KORE2 wont' even recognize as a midi controller anymore. I feel so hurt. .
Hang in there! If you give more details about what OS, what controller editor software and what you already tried, people might be able to help. I'm on Mavericks myself and don't use Kore as a midi controller so I don't think I can help, but someone else probably can. You can also try the FB group called Loyal Kore users: https://www.facebook.com/groups/218988171459534/?ref=bookmarks
I've never known Kore not to recognise ksd presets no matter what OS they were made on - it's been really good that way - unless they reference specific plugins that are not available on the new OS of course. That could be the problem?