The exTables Administrator needs to add you to the exTables Service.
After he has added you the service you should receive the following email inviting you to the service.
If you did not receive an invitation email, the Administrator can send resend the invitation through the Resend inviation email link on the user configuration dialog.
To setup exTables, follow the Download exTables link to download the MSI file for the setup and follow the instructions in the setup wizard.
After the setup wizard is completed the exTables Desktop app should be available from the Start menu in Windows: