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The installer has two main uppercase switches for the unattended installation and starting from version 1.9.7 there are command line parameters for file association and application closing:

/S for silent installation

/D=C:\Program Files\My Installation Dir to set the installation path

(note that the installation path has no double quotes) 

/jpg=1 /gif=1 to associate jpeg and gif files and /jpg=0 /gif=0 to unassociate them. Use the names found under File - Settings... for the other file types. There is also /all=1 and /all=0 to associate/unassociate all file types

/kill=1 forces the closure of the application before installing it, working for Win2000 or higher

(unsaved data are lost)

The uninstaller has one uppercase switch for the unattended uninstallation (the uninstaller always unassociates all file types):

/S for silent uninstallation