I know my old password

If you can login with your old password to My Account area, you can simply change your password in Account settings:

https://swiftperformance.io/my-account/edit-account/

I forgot my password

  1. Go to https://swiftperformance.io/my-account/
  2. Click to “Lost your password?” button
  3. Provide your e-mail address what you used for the registration. You will get a mail, you need only follow the instructions