To remove Readiris from your computer:
Click Finder and open the Applications folder.
Drag Readiris to the Trash.
Readiris will be removed from your machine.
Note: the Readiris preferences are not removed by dragging Readiris to the trash can, in case you should want to re-install the software later on.
To remove the preferences:
In the Finder's Go menu, press and hold Alt.
Click Library > Library > Application Support.
Drag the Readiris folder to the trash.