Stimulsoft has a built-in functionality to let end user changes the design of the reports distributed with your application.
Of course, on the end user machine, you need to install some distributable assemblies listed in the User Manual help file, but you don't need to install the full report designer on the end user machine (and you are not legally allowed to install it) .
The only thing you need to do in code is to call the
report.Design();
instead of report.Show();