After paying for your MyEclipse subscription you should receive an email sent to the email address you registered with the http://www.myeclipseide.com portal. In the email you will receive your Subscriber ID and Subscriber Code, these are to be copied and pasted from the email into MyEclipse’s subscription fields found at the location Window > Preferences > MyEclipse > Subscription > Enter Subscription. After clicking OK your subscription information will be validated and you are free to continue using MyEclipse, though you will also need to activate the product within a few days. Refer to this FAQ for information on activating MyEclipse.