Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Format
D3DEXPORTFILTER_FORMATParameter: Save Templates
D3DEXPORTFILTER_TEMPLATESParameter: Export Textures
D3DEXPORTFILTER_TEXTURESParameter: Save Normals
D3DEXPORTFILTER_NORMALSParameter: Generate Mesh
D3DEXPORTFILTER_SAVEMESHParameter: Adapt Textures
D3DEXPORTFILTER_CONVERTTEXTURENAMEParameter: Suffix
D3DEXPORTFILTER_TEXTURESUFFIX