Glossary Converter installation error: "Could not find Excel or Open Office. Spreadsheet formats are not available."

Hello all,

I've recently purchased SDL Trados Studio 2017 and downloaded Glossary Convert today. During installation, I got the above error message. When I click OK, Glossary Converter is open, but when I try to drag an Excel file on top of Glossary Converter, its green border turns red.

I have Office 2013.

Thanks for any help.

Regards,

May