Honestly, the best place to start is here: https://wyday.com/limelm/help/getting-started/
And since you're using Delphi, that will lead you here: https://wyday.com/limelm/help/using-turboactivate-with-delphi/
Which will tell you exactly what the example app is showing: a hybrid trial / full version app (see the beginning of the step-by-step walk-through for a full explanation of what that means). Of course, TurboActivate is flexible. If you want to disallow trials, then you can do that.
Whatever fits your business needs, TurboActivate & LimeLM can do.
Let me know if you have any other questions and we'll be glad to help.