The plug-in package consists of the FileOpen.api Acrobat/Adobe Reader plug-in, and an optional companion plug-in, fowp4kbd.api. The main plug-in, FileOpen.api, must be installed to open encrypted documents. The companion, fowp4kbd.api, which restricts the taking of screenshots, is optional though some publishers may refuse to grant permission to open files if this plug-in is not installed.
In some instances, under Windows, the installer will also deposit a program in the system tray called FileOpen Certification Manager. This program manages the transition in and out of an Adobe viewer state called Certified Mode, and should only be installed on systems that have a copy of Acrobat/Reader 7 or lower and have installed at least one Adobe eBook; you can delete this program by clicking on its taskbar appearance and selecting Uninstall.