How to remove devices from account

Hi Michael, 

We will clarify this for you. 
For this you have to uninstall the AVG from the respective devices manually and then install it in the desired devices. 
Let us know if you need any help in this.

from my searches, i think this has been an ongoing request to AVG. Is there any recent development? i want to manage and remove old phones and PCs from my account so that i can install it to new ones.

If the device crashed and cannot be uninstalled manually or if the device was already reformated, what are my options to delete these devices from my device count.

Hi Michael, 

We will clarify this for you. 
For this you have to uninstall the AVG from the respective devices manually and then install it in the desired devices. 
Let us know if you need any help in this.