Siteorigin premium

Hello! First of all, thanks for your work and for the great tool you have done. I was able to build my website without any knowledge and for free. What you are doing is great, guys ;)
I was going to purchase the premium vantage, but I do not want that credit card is automatically charged next year again (I do not know if my web site will be alive).
Is there any way to acquire the premium service just for one year?
Germán.