Once you have registered on the website, it is not possible to change your or your search gender. You will need to create a new account with the category you require.
Start by deleting your current account(supported only in web browser version):
  • Access the "Settings > MyAccount" section by hovering your mouse over your profile picture the top right-hand corner of every page.
  • Click "Delete my profile" link at the bottom of the page 
  • Confirm your request by clicking "To delete your account and all your information permanently, click here".
You will lose access to your account and your profile will disappear from the website so, you will be able to use the email address that was linked to your original account to create a new profile.