Many times when you buy software it will also come with demo/trial versions of other programs.
These may automatically install with the program you paid for (this is called “foistware”) or you may see the other programs listed on the installation interface.
This often causes confusion if you run one of the demo programs and think “Hey, I paid for this software, what’s with the 15 day trial?”
If you run the program you paid for it should work just fine—full version.
~ David