Repeat of recent reply to a PM/Conversation;
Genie is for Legacy hearing aids.
Genie 2 is for Newer/Current hearing including the Oticon Opn 2 (a.k.a. Oticon Engage)
The NHS Oticon Engage is equivalent to Oticon Opn 2 hearing aids and is locked. Please read a DIY School Hearing Aids PDF file...