Media Vult Control center

[murater]

In the relevant sections of the Guide to MediaVault, it is described that the disks may be added/removed/formatted through disks section of MedaVault Control Center. However, in my mediavault CC (MV 2120), I cannot see any buttons as deccribed. I only see the information about disks, but no add/remove/format buttons.
Are the new versions (V.2) of MediaVult differnet or is there a problem with my structure (I added an additional drive as non-mirrored disk, in disks section, both disks seem to be healthy, but no chnace to cahnge it back to mirrored).
I would really appreciate if somebody can give me an idea about this..
Thanks..