Why is my ares version changing from the old version to ares vista?

i dont understand this-i downloaded the older version of ares.however for some reason when i switch off my laptop the next time i switch on that ares automatically changes to ares vista and start asking me for credit card details etc.i've done it about 4 times now just to make sure that i'm not the one making a mistake.can someone help please.all i want is the free ares version.thanks for your help.