Yes, You can use your activation code on multiple computers, but only one can be active at a time. You must deactivate one before activating the other. Each time you use a new computer, you must enter your information in the registration dialog.
To activate for the first time on a new computer, start the program, and in the registration dialog, enter the activation code that will email to you along with your information.
Once the code is active:
To activate, open the program and follow the prompts.
To deactivate, go to “Help” > “Deactivate Product”.