How do I deactivate some of the devices?

I had AVG ultimate with unlimited devices.  Now my account shows I have 10 devices.  I am not sure when this happened and I don't remember renewing with such option.
In any case, I used to be able to deactive devices using AVG ZEN.  But that is no longer available, but when I try to install and activate on devices that I had to format and re-installed windows, it says it went over the limit and I should remove some devices. 

I cannot find any way to de-activate in the application and in the web site.

Greetings,

We're glad to look into this & clarify.
Upon checking your account, we're unable to locate the subscription. It might be registered under your alternate account.
As it isn't recommended to share the license info over this post, we've sent you an email requesting few info.
Please revert to us via email to proceed further.

Greetings,

We're glad to look into this & clarify.
Upon checking your account, we're unable to locate the subscription. It might be registered under your alternate account.
As it isn't recommended to share the license info over this post, we've sent you an email requesting few info.
Please revert to us via email to proceed further.