Hi
It is only my BMW that I need to export a date range. Following your comments, I tried the Mini and that works as you have mentioned, but the BMW still won't export a date range.
Please use the Contact Support in the app. Make sure to include your backup data and let me know what date range you're looking for.
I'll see what I can do. I will be travelling tomorrow, so if you send it tonight, I should be able to look before going to the airport. If not, it will be late Thursday or Friday before I get a chance.