At the start without parameters the dialogue box appears allowing to set a folder where archives are to be unpacked and also some parameters for unpacking.
E.g. it is possible to instruct XacRett to save the unpacked files in the specified folder and further in the folder of the same name with an archive. Types of files which are to be associated with XacRett are also specified here.

The usage of the program is pretty simple: you should start by associating an archive file with XacRett in any file manager - all its contents will be placed in a foldder specified in settings.