How to Edit Settings on virtual vCenter running vmx-10?

Hi,

Recently I setup whole new vSphere 5.5 environment on several physical servers and then deployed virtual vCenter 5.5.

Unfortunately I made a mistake and upgraded virtual HW to vmx-10 on vCenter.

Now the problem is: how to Edit Settings on that virtual vCenter in order to add memory or CPU? (yes, HotAdd is disabled)

I'm not asking how to mount ISO or add HDD as this is straightforward but I'm interested in changing configuration via required web client when web server is down?

Help would be appreciated.

Best Regards,

Wojtek