You can disable the auto renewal, but as has been pointed out, you have to do it via Avangate.
The process:-
1 find your order number. (not the serial number, - the order number which is an 8 digit number) as you may need it to register.
2. If you did not register an account with avangate when you purchased, then register
here:- https://www.avangate.com/login/
3. Log in by selecting "software buyer" where it says `select your account type` in the popup/square on the right of the screen.
and entering the password and email you just registered under.
5. Another screen will open - it should read `2CO Customer area`. where it says `already have an account` click the `login now` button. (you can also register your order number here to link your account with your orders)
6. Enter your email and password again. and log in.
7. Find the malwarebytes entry and click `view order details`
8 You should see a blue highlighted link reading `product history`, click that.
9 In the middle under subscription status, there is a link to disable auto renewal, click it and confirm it.
10. Log out, job done.
To be honest it puzzles me why companies insist on doing this sort of thing as its self defeating. People aren`t daft and pick up quickly on when a company trys such tactics to get you to keep buying.
Put bluntly, it pisses them off. (as seen above coff, coff...), Using the excuse, "Well everybody else does it" just doesn`t wash..
A happy customer will come back... whereas a disgruntled customer is unlikely to use your service again, (and it doesn`t take a psychologist to understand that..).
Which is a shame, as malwarebytes IS a good program.
Be happy