Products & Services
Referring to this thread, it would appear that your email address for the forum cannot be changed, so you would need to create a new account. If you need to change your email address for your F-Secure products account, you will need to contact support.
You should also be aware that this is an open forum, which can be read by anyone, so you shouldn't post personal details such your email address for privacy and security reasons. I would therefore advise that you edit your post to remove your personal data.