AVG says that I don't have a valid key when I try to performance fix free first time use

Hello Mark, I apologize for the difficulties caused. Please connect to our technical support through the following link https://support.avg.com/support_contact_form?l=en_US&retUrl=support_sales to fix this issue. Thank you.

Bought a three seat package AVG virus
loaded it with the key that was inside cd pkg.
Went to use and it said was only good for 30 days and I then douwnloaded again from sight for one year
recieved new key (12 month).  three days later went to use fix performance (free one use)
and it down loads does analysys and then asks to register which I did, signed agreement and privecy
then click to execute and it comes back saying my key is invalid.  I have the key that they say I should have. 
Where can I update key so AVG see I have the correct key in my computer
Win 7, explorer 11 also have firefox 
–I also qued up my AVG account and enterd what I could but when I have avg
show what I have it is asking me to dowload from their site AVG virus another time
–AVG virus is working and scanning fine computer,web, identity and e-mail protection
I'm tired of entering the same info just want to use the performance check once for the win reg fixes
I don't need what's in windows system fix that's easy to use.
Let me know if you have any ideas and thanks

Hello Mark, I apologize for the difficulties caused. Please connect to our technical support through the following link https://support.avg.com/support_contact_form?l=en_US&retUrl=support_sales to fix this issue. Thank you.