You can use Smart Shooter for a trial period without buying a license. During the trial period, all features of the app are unlocked, so effectively it behaves like Smart Shooter 3 GRID.
The trial period lasts a fixed amount of time of one month, after which the software will become locked. To unlock it, you will then need to purchase a license.
Once you have purchased a license, you can unlock the software again using the license key, For instructions on how to do this, please refer to the Registration documentation.
The End User License Agreement (EULA) is included in the software installer package. The EULA document is also available for download here.
The above download is for the Windows 32-bit version of Smart Shooter, which supports Windows XP and later. If you are unsure which one to download, then first try the normal 64-bit version of app, listed at the top of the page.
Previous versions of Smart Shooter can be downloaded from here.