Solution : https://service.sap.com/sap/support/notes/109053 (SAP Service marketplace login required)
Key words : 
~ftp/general/frontend/patches/rel40b/windows/win32/gnsmx_z, ~ftp/general/frontend/patches/rel31i/windows/win32/gn_z, additional key words session manager, error occurred due, session manager, application browser, 'info catalog', application bar, menu files, cache files
Related Notes : 
       
| 123889 | SM: window too small when you start SM the 1st time | 
| 96885 | Downloading front end patches |