When using FME Desktop, you can use relative paths or the FME_HOME system parameter in the workspace to locate a data source or other resources in relation to the FMW executable location on disk. However, when using the Data Interoperability extension for ArcGIS, the FMW executable is stored in a different folder than the toolbox - for example my data interop toolbox is located in D:\\data-interop, but the actual FMW file is in C:\\users\\myuser\\AppData\\Local\\Safe Software\\Interoperability\\ArcCatalog in an ArcGIS-managed folder that seems to change names.
Is there any way to use the toolbox location path in a data interop workspace, or create relative paths using the toolbox location?