Deactivate old computer when HD is crashed

I have a new computer when my old one crashed. Now i can not install mij Parallels and instal it on my new computer!
Why is there not a possibility in my account to delete a computer and instal a new one!

 

I have Parallels 10 and 11 but i can not unstall it from the old computer

 

Hello, we've reset your Parallels Desktop license keys, please try to activate and let us know how does it work for you.

 

Thanks it works again
Why is it not possible to deactivate my old computer in My Parallels? In that place i can see my 2 serial nummers , why nog activate/deactivate the computer from that place?

 

The deactivation works OK for newest version, from time to time we meet issues with oldest version deactivation.