All DynaPDF Demo versions are fully functional, but a demo string appears on new created or edited pages. You can develop your application entirely with the demo version. Later you can simply set the license key to deactivate the demo string.
Please note that the Linux, Unix, and macOS archives contain the shared and static library and a few examples only. Please download at least the help file too.
All demo versions are the same as DynaPDF Professional, which offers an unlimited functionality.
BTW - DynaPDF is also available as MBS Plugin for FileMaker, and Xojo. You find more information on the Monkeybread Software website.
To check whether a function is disabled in DynaPDF Starter or Lite, pass the string "Starter" or "Lite" to SetLicenseKey(), depending on the version you want to use. All functions which are disabled in these versions return then with an error. If you don't use an error callback function then call GetErrorMessage() to determine whether a disabled function was called.