Awesome now working! Thanks! I really wish you could implement an option for users to just enter an email to send out invitation code like in old Vbulletin 4, It had like thousands of downloads! Then this addon would be perfect with email invitation function
Added filters on "Registration invites usage log" page
Added an option to enable/disable the key requirement during registration to use the add-on in the mode of referral system instead of closed registration by invites (disabled by default for new add-on installations)