To upgrade Siebel Driver, you'll have to replace the EFConenctor.dll file in Siebel Communication Server. If you are upgrading from V3.4.2 or previous releases, there are changes in DEF file so you need to import new def file. You also need to replace icon images in certain folder mentioned in install guide. Refer to Siebel Install Guide for details.

To upgrade EF Connector, download the upgrade utility from Google Drive and follow the upgrade instruction mentioned in EF Connector Install Guide > Upgrade Software. Upgrading the software will replace the Generic-Connector.jar file while retaining the older configurations.

If you are upgrading from version 3.4.1.01, you need to include a new parameter USE_SSL(>Generic Connector Configuration)and request a new Licence key to make GC work correctly.