First solution:
In order to sign up to the platform please go to the http://support.thomalex.com/support/login
If you don't have the account you can signup by clicking on a "SIGN UP WITH US" button as shown below.
Clicking on that button will display a new page where you should insert your Name and your Email.
You will receive an email with the activation URL. Please click on that link and you will be redirected to a page where you can set your password for the Support account.