The installer has two uppercase switches for the unattended installation and there are command line parameters for file association and application closing:
/Sfor silent installation.
/D=C:\Program Files\My Installation Dirto set the installation path (no double quotes).
/jpg=1 /gif=1to associate jpeg and gif files and
/jpg=0 /gif=0to unassociate them (see the supported file types under Settings - Global Settings).
/all=0to associate/unassociate all supported file types.
/kill=1forces the closure of the application before installing it (unsaved data are lost).
The uninstaller has one uppercase switch for the unattended uninstallation (the uninstaller always unassociates all file types):
/Sfor silent uninstallation.