Solution : https://service.sap.com/sap/support/notes/1446840 (SAP Service marketplace login required)
Key words : 
settings\<username>\application data\sap\commonfor configuring, threadid=449137&tstart=0 downloading sap gui patches, application data directory located directly, %appdata%\sap\commonwhere %appdata% stands, user specific local file path, prerequisites sap logon control features, settings\<username>\application datain, typical application data directory, /irj/sdn/sap-gui, typical sap common directory
Related Notes : 
       
| 1501672 | Logon Control fails when the default R/3 system is selected | 
| 1053737 | Expected release dates for SAP GUI for Windows & ITS Patches | 
| 563161 | SAP GUI, SAP ITS & SAP IGS patches on Service Marketplace | 
| 535308 | How to apply a SAP Front End patch? | 
| 330793 | Downloading patches |