Answer
The specific Excel export format options shown are controlled entirely by the Crystal-owned, not IFS-owned, export DLL version installed on that specific client machine, specifically u2fxls.dll on older tracks like IFS 2003, superseded by crxf_xls.dll starting with IFS 2004. These DLLs live in the Windows system folder and get overwritten whenever a newer Crystal Runtime is installed, whether via installing a newer IFS client version or via separately installing a newer Crystal Report Designer version, 8.5 or later, on that machine. Comparing the exact DLL version present in the Windows system folder between the two machines, rather than just comparing IFS client versions, is the way to identify what's actually different and restore the richer export option.