Solution : https://service.sap.com/sap/support/notes/638503 (SAP Service marketplace login required)
Key words : 
solution start transaction se80 select function group frml513 navigate, menu path recipe formula -> display <-> change, recipe formula menu delete, display <-> change entry insert, function group, mode switches correctly, place enter &wbtogl, recipe workbench, application toolbar, terms frml102
Related Notes : 
       
| 631420 | RMGMT210: Corrections in Support Package 04 |