In the email which contains your registration name and code after you purchase Spam Arrow, you will be provided a temporary URL to download the full version. Please remember to click the link to download and install the full version which will automatically overwrite the trial version.

In the full version, there will be pop-up window which shows how many days left for the 21-days trail version. There will be a dialog from menu "Help->Register..." where you can input the registration name and code.

If you meet any problems, please contact support@spamarrow.com