Все верно. В 3.3 новая система защиты - там недостаточно ввести код, ее надо активировать по инету. Я покупал еще 2.7 вроде, когда вышла 3.3 мне прислали новый код ( т.е. код к 3.3) и объясниловку:
We are glad to inform you that the new ReGet Deluxe 3.3 is released. In this version we have improved registration system and your old activation code will not work for ReGet Deluxe 3.3.
Here is your new activation data:
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This user name and product key can be copied and pasted to activation dialog through Windows clipboard. Detailed instructions on how to activate the program are available from http://deluxe.reget.com/en/reg_info.htm
Frequently asked questions about activation are answered here: http://deluxe.reget.com/en/reg_info_faq.htm

ReGet Deluxe 3.3 is available at our site http://deluxe.reget.com

Your old registration information is still valid for ReGet Deluxe 3.2 and earlier versions.

If you have any questions concerning activation please do not hesitate to contact our support department at support@reget.com.
Могу посоветовать покупать непосредственно через softkey (переводом деньгу отправляешь, по почте код получаешь).