I think you will need to upgrade it to version 6.3.x to have the air group and also get the certificate fixed... unless aruba already made a fix for air group on 6.1.3.x??? which i dont see...
On 6.1.3.x(normal firwares you don thave airgroup so on 6.1.3.9 you wont have it.
Neither on 6.2.x
On 6.3.x you have air group.
Cheers
Carlos