If you cannot log in to the app, make sure that you do not leave any spaces before or after the email. In addition, we kindly ask you to pay attention to uppercase and lowercase letters.
If it doesn't help, try to reset your password using the Forgot password link, which can be found under the password box in the login menu.
If that does not solve the issue, please contact support via the Submit a request contact form below and include an email you used for registration and a copy of your payment receipt.