When you try to log in, "Forgot your password?" should show up right beneath the email and password fields. Please click this hyperlink and wait for the email confirming that you've reset your password. From here, you can create a new password.
If you signed up with Google, this option will not work. In this case, please update your password via Google.
Step 1. Click "Forgot your password?" Step 2. Enter the email address associated with your ShapeShift account
Step 3. Check you email and follow the steps provided to reset your password