Bizarre Subscription Downgrade

Last night, multiple pop-ups flashed on my monitor. They disappeared so quickly, that all I could read was "deleting file XXXXXXX" (file names appeared to be system files).  Concerned that my system was somehow becoming infected, I pulled my modem cable and shut down my computer. About 15 minutes later (after rebooting both my modem and router), I restarted my computer.  A Windows Security pop-up notified me that my firewall was turned off. I immediately went to open AVG Antivirus and saw the message, "Upgrade to Activate" and that my AVG Antivirus 2015 had somehow downgraded to the free version.

I received and installed my 1 year subscription on 3/11/15 so (obviously) I have quite a few months left on my subscription.  I see that there are more than a few assorted renewal complaints listed, so what is the problem? How do I fix this?

Thank you for your assistance.

Hello Nancy. I really apologize for the inconvenience. Please follow the steps below to get back your paid version.
I request you to click this link
 http://www.avg.com/ww-en/redir?url=http%3A%2F%2Fdownload.avg.com%2Ffiledir%2Futil%2FAVG_Remover.exe&urlSec=UhT%2BBzZUdTGTfMN%2BMUDefLYjJIc5sr9PT4gwqqdOZLdqTfL1KgHh6k4Nsq3ZpPAN%2FWp9nmon7o%2BnrfxaAPzsIptQIlunFYQBgQKFnrQcCG2PUJLhfywLrIMdkpGr%2Bp%2B6
to download and run the AVG Remover tool.
Please select the AVG products which are shown in the remover tool window and then start removal process.
After the remover tool process is successfully finished, I request you to restart your pc.
After the restart, I request you to manually delete the AVG Remover folder in the C drive of Mycomputer.
Later, please reinstall your product after that and you will be good to go.
Thank you.

Hello Nancy. I really apologize for the inconvenience. Please follow the steps below to get back your paid version.
I request you to click this link
 http://www.avg.com/ww-en/redir?url=http%3A%2F%2Fdownload.avg.com%2Ffiledir%2Futil%2FAVG_Remover.exe&urlSec=UhT%2BBzZUdTGTfMN%2BMUDefLYjJIc5sr9PT4gwqqdOZLdqTfL1KgHh6k4Nsq3ZpPAN%2FWp9nmon7o%2BnrfxaAPzsIptQIlunFYQBgQKFnrQcCG2PUJLhfywLrIMdkpGr%2Bp%2B6
to download and run the AVG Remover tool.
Please select the AVG products which are shown in the remover tool window and then start removal process.
After the remover tool process is successfully finished, I request you to restart your pc.
After the restart, I request you to manually delete the AVG Remover folder in the C drive of Mycomputer.
Later, please reinstall your product after that and you will be good to go.
Thank you.