Two different computers showing two different expiry dates?

AVG Tuneup : I installed this on my laptop last year. Expiry date is correct  and shown as July 2020.
My older PC hasn't been used since & I thought I'd put it back into service. Unfortunately it won't allow me to activate Tuneup since it claims the subscription expired in July 2019. Neither can I access my account on the older PC. How can I get the diplayed expiry date changed? (Older pc is tunning V19,1, build 995) Thanks.

Hello Jan,
We are glad to assist you.
It looks like re-activation is required for AVG TuneUp installed on your second windows PC.
Refer this article for the activation instructions and use the code which I sent you via an e-mail.
If you don't see my e-mail in your inbox, do check it in spam/junk folders as well. Thank you.

Hello Jan,
We are glad to assist you.
It looks like re-activation is required for AVG TuneUp installed on your second windows PC.
Refer this article for the activation instructions and use the code which I sent you via an e-mail.
If you don't see my e-mail in your inbox, do check it in spam/junk folders as well. Thank you.