i cannot remember the email from my old account only username and password

[dashengye]

我不记得来自旧帐户的电子邮件，只有用户名和密码

[MrDario]

1 hour ago, dashengye said:

我不记得来自旧帐户的电子邮件，只有用户名和密码

You already have active licenses on this account, if you're trying to recover another account I will need the username and a proof of purchase.

You can send them to me via private messages.

[1450669839]

hey  i lost my email ，how can i change linked email