You can reset your data on History easily.  Also, you can delete data filtering with a date range, category on Overview, and search results on History.

@Data Reset

You can reset your data and delete only search results on History.

@Delete after filtering category and date.

You can delete data filtered by category and date from the Overview. Set the date by Yearly, Monthly or Daily from the title button and tap the category. Then, tap the action button in the upper right corner.