It is not possible to define assembly overrides at project-level at this time. This is because the OpenEdge client runtimes have fixed names, e.g. prowin.exe, _proapsv,exe, etc. and therefore a fixed .config file. This differs from Visual Studio where the executable name is generated per project and therefore varies. It is in theory possible to rename the OpenEdge client and its .config file, e.g. myprowin.exe and myprowin.exe.config, but there is no facility available in PDSOE to reference the renamed executable. Per the feedback I received from Development, PDSOE does not provide an option to change the AVM/Runtime executable name for any project.