We've recently been made aware of a problem that would prevent CorelDRAW Graphics Suite X6 (the original version) users from upgrading to X6.1 (the first update / service pack). The root cause for this issue has been identified and we will be fixing the problem with an upcoming update on our servers scheduled for June 11th, 2015. In the meantime, if you need to update X6 to X6.1, please contact our technical support team who can help with a workaround solution.
The issue should not be fixed. In the very rare case you get a message indicating that there is a problem with your account when you sign in to apply the update1 patch, just close that dialogue and you should be good to go.