The last time I looked at that csv download option, (on the cancellations tab) it said that once downloaded the data would no longer be available to view. That seemed a bit weird, so I made the spreadsheet myself leaving the data still available. Check the warnings before blindly going ahead. Many hosts must already download csv's, so it's quite possible only the cancellations tab is affected like this?
@Ian-And-Anne-Marie0 there was no warning on my side when trying this out today. But I noted several small reporting bugs on their sites with calculations, so keep a separate spreadsheet why this information and update it regularly. With Airbnb, who knows but thanks for the warning. 🙂