For reference - this is the original discussion:
That redirect is caused by the fact that there is a parameter i=4 in your request and you do not have the correct access cookie. As I speculated in the other topic, it would either be caused by an i parameter being used by CubeCart itself or some issue with the cookies.
I’m quite sure that this is not some ploy to make you upgrade (giving people a broken free service doesn’t exactly assure that the paid service would be any good). But I can’t think of anything I could do to fix this.