Solution : https://service.sap.com/sap/support/notes/557780 (SAP Service marketplace login required)
Key words : 
\program files\common files\sap shared\system, \program files\sap\frontend\controls, 0a front-end patch 10, 0b front-end patch 4, 0b front-end patch 5, front-end patch appears, repair dialog box appears, /general/r3server/abap/note, bex query designer asks, front-end patch
Related Notes : 
       
| 559624 | BEx Query Designer: Long processing times in cell editor | 
| 197460 | BW Frontend Checktool sapbexc.xla |