I just looked for your order, and actually, you ordered the version 2004. So you should have received in July 2005 an email with a link to order the version 2005 with a discount, as stated in this newsletter : https://www.managames.com/newsletter/new ... 13_en.html
More over, you can see in this newsletter https://www.managames.com/newsletter/new ... 25_en.html
that only owners of the version 2005 can get the version 2006 for free.
Unfortunately, I cannot guarantee the delivery of the newsletters, as many Internet providers have very strong anti-spam filters and so block such kind of newsletters.
Thanks to not blame me for the consequences of spammers' acts.
Anyway, a discount is still available for you, I just sent an email to you with further details about how to get it.