When you purchase a Test Studio license you need to switch the activated license from the current Trial to the Purchased one.
The Test Studio activated license can be easily managed through the Manage License window. To access it, you can use the Help drop down in the upper right corner of a Test Studio instance.
Click the 'Change License...' button in the lower left corner to access a list of all available licenses under your account.
Select the desired purchased license and click on the 'Change License' button.
Congratulations you are now using a licensed account!