What is the version number for SecurityCenter in the one you installed? (Open it and click About or Navigation > About). The reason I ask is that the 2011 edition is now obsolete and in any case once registered you can download the latest version from your online account whenever you need it.
If you forgot your online password or which email address you used there is a "Forgot Password" pr "Forgot your email address" link right there. The account does not use a User Name. Unless of course you obtain the software from a 3rd party website then maybe you should ask them.