A few questions

Hi!
i am thinking about buying the pro version of armember. i have checked many registration plugins and its pretty easy to handle and has alot of good functions, so its the best member management plugin i have seen so far. Still there are some details remaining not clear for me. Before i will buy it, i want to have some answers to my open questions…. how can i get in contact with the developer in advance?
here are my questions:

1. is it possible to buy it from a nother place then envato market? i only can buy a “regular license” there which means, i only can use the key i buy for 1 website on which the endmember doent have to pay for a service. my service is free in the beginning, but later i migth want to get some money out of it. By the way, what sense does that regular licens makes if one of the nice and important funktions of the free part of the addon is the planing of payments?

2. Can i get keys cheaper if i buy more then one? im planing to use the plugin for more the one website.

3. Is it possible to restrict certain fields in a form from being changed later on. Example: the user accepts on the registrations the “terms and conditions”. On my form, the user can change that later in the profil edition page, that makes no sense.

4. i messed a bit around with the fields on the formbuilder. now i have some field templates in the “present fields” tab which i want to delete…how can i do that? a simple button would be nice.

5.In the tutorial videos there are more functionalities then i have….is that because i dont have the pro version? (for example i cant customize the profil of members, change the fields that are shown).

thank you for a fast reply, cheers michael