App modifies loginwindow.plist everytime I launch it.

Question

WLan.app modifies loginwindow.plist file in order to launch itself on every login.
Also if I modify the loginwindows.plist file, deleting the voice related to WLan.app, when I launch this application the value is written again.
Does it depend on the application code, or there's a way to deny this change modyifing any system value?
Thank You, ask me if You need more infos about.

Answer 1

Make a temporary, backup copy (if you don't already have a backup of the library) and try the following:
1 - delete the iPhoto preference file, com.apple.iPhoto.plist, that resides in your
     User/Home/Library/ Preferences folder.
2 - delete iPhoto's cache file, Cache.db, that is located in your
User/Home/Library/Caches/com.apple.iPhoto folder (Snow Leopard and Earlier).
or with Mt. Lion from the User/Library/Containers/com.apple.iPhoto/
Data/Library/Caches/com.apple.iPhoto folder
3 - launch iPhoto and try again.
NOTE: If you're moved your library from its default location in your Home/Pictures folder you will have to point iPhoto to its new location when you next open iPhoto by holding down the Option key when launching iPhoto.  You'll also have to reset the iPhoto's various preferences.
NOTE 2:  In Lion and Mountain Lion the Library folder is now invisible. To make it permanently visible enter the following in the Terminal application window: chflags nohidden ~/Library and hit the Enter button - 10.7: Un-hide the User Library folder.
If you have problems locating the cache file don't worry about it.  The key file to delete and rebuild is the preference file.  Once you relaunch iPhoto reset the iPhoto prefs to what you want.
OT