Le mercredi 15 février 2012, Jean Milot a écrit : I ------------------------- Hello John, What I do not understand all in your example: "Example, 1 - I created a test folder on the desktop. 2 - I click to open 3 - I have a full window to select the application to use, 4 - I select konqueror then I record this parameter. 5 - After I have no worries for this user. " When you create a directory on a user's desktop*, it initially has the icon of a "folder". There is no ambiguity for the user and a "standard*** click**" opens it... As this is "basic" operation, I do not understand the point 3 and following, below. Perhaps it would be better not to have taken a directory as exemple... In the case of the icon of a file (document) on the desktop, it is possible to do context-click and tell the system to use the application to open this document ... The system opens a window whose contents starts with "Open With" ... The result of the action, if you check "remember the association between the application and the file type" is stored. You can modify the concerned association with the "KDE Control Center" (kcontrol: "KDE Components" -> "File Associations"). The description of your example is similar to using this "context-click" ... I guess it is this association that poses a problem for you because you have the "replicate" for each of your 400 users. Did I well understand? Cordially Patrick * I guess by context-clicking on an unused area of ​​the desktop and in the "pop-up menu" arising: -> "create a new" -> "folder" ... ** Single or double, depending on the setting for this user *** "Standard" is pressing the left mouse button and "contextual" is a pressure on the right. But this can be reversed by setting, for the lefties for exemple.