I got that auto renew email just like everyone else. Here's what I did to cancel (and fingers crossed that it works!)
I called my credit card company, was told that there was a charge from 1 year ago on a different credit card # (but it automatically will transfer to my new card) from Avast Digital River.
The number associated with this company was *******089.
Even though the automated voice says they do not deal with online, that is not true, stay on the line and get to a regular customer service person for "non-technical" support.
I ended up speaking with someone located in the Philippines! I told him this was a scam and that if he did not help me I would go to the local news station.
He helped me to cancel the auto-renew in like 3 mins.
Now I just have to wait for my next billing cycle to confirm there was no charge.
If I do get charged, my plan will be to dispute the charge with my credit card company, and I may actually go to the news station.