We have recently been receiving reports that spreadsheets downloaded from REsearch are not opening properly on some user’s computers.
Please follow this guide to disable the Protected View which seems to be the culprit.
3. Trust Center
4. Trust Center Options
5. Protected View
6. Uncheck “Enable Protected View for files originating from the Internet”
Done. please try opening the file again.
Please see steps 1 and 2 of this guide: Custom formats – building, downloading and saving a custom format