excelcnv command line options - excel

I found posts that recommended excelcnv.exe as a way to convert a CSV file to an Excel file, e.g. How to export a CSV to Excel using Powershell, which uses the command line switches -nme and -oice.
Does anybody know what these switches do? And are there more switches available?
I couldn't find any documentation on excelcnv.exe.

This blog post might help you. The author lists some command line switches but does not go into detail how he found out about them.

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