As of now, only the full version of Secretary is available for download. There is no more distinction between the basic and the full version. Demand shows that the overwhelming majority buy and use the full version. People want the whole package, so in the future only the whole is offered with all modules.
What happens to all those who have purchased the basic version?
Your account was upgraded. You can simply use the better version. There are no additional costs for you. Have fun!