The trial version of the TA/TA+ software is valid for 30 days. You can decide anytime to buy a TA or TA+ license from our web site.
Once you have received your registration key, open the software. From the license management screen (File > License), fill-in the email address you used to order the key, and the registration key. Click on "Register".
You have now upgraded from a trial version to a licensed version.