The tasks scheduled in the previous version of Talend Administration Center were generated via the CommandLine of the same version, but you may not need to recompile these tasks with the new CommandLine.
These binaries are located in a folder that is defined in the Generated jobs folder parameter of the Job conductor node in the Configuration page. In this archive folder, all generations of a specific task are stored in a dedicated sub-folder.
If you used the Export parameters and Import parameters options to retrieve your configuration settings, the path to your existing archive folder is automatically preserved.
For more information on how to visualize the generation version in the Job Conductor module, see the Talend Administration CenterUser Guide.
If you want to force the regeneration and did not use the Export parameters and Import parameters options, simply update the path to the archive folder in the Configuration page.
If you wish to continue using the old version of the Talend Administration Center application in parallel with the new installation, you must create a new archive folder, copy the content of the old folder in the new folder and fill in the path to this new folder in the Configuration page.