Could not find mount point, can't keep encryption keys

Hello, through my search I found out that group folders doesn’t support encryption, however the answers to this was basically “this will be dealt with in NC15”. I’ve recently upgraded to NC15 and I’m not sure how it was dealt with. I still have three group folders which are causing some serious errors and issues for me. Is there a step by step guide/process on how to get these group folders working again?