HI @DannyPancratz have you tried to type a start date you want and approve your input with enter key?

Thanks, @Aleksandra. That solution worked. 

However, it still is confusing in the UX why All time is an option for the User export, but not the Topic-based exports. It seems like a common parameter community managers might want.

Hi @DannyPancratz 

I understand your point of view. On other hand, we believe that all-time topic-based exports should not happen too often, and for big and old communities it would be a huge dataset. That is why we decided to disable this default option and only allow manually type your date range and get this way the data for longer periods.