I am very sorry to say that after long time customizing Membership plugin we decided to stop developing it and stop purchase plan.
I am very sorry because it almost did everything perfect but it is not customizable enough.
Please inform us if you will make some changes due to buy your plugin and start using it with those features.
First of all we don't want to use Buddypress.
1. Custom registration fields (If they are made using Cimy extra fields then those fields to implement on account page also.)
2. Prefill some fields with Social network registration (on popup registraion not on login.php or to use authentication, only prefill fields)
Please inform us when you will enable those futre or if test some 3rd party which actually works.