Taxonomy Filtering via dropdown

Hello,

Great plugin and everything works great but I have a small query. We have the search working with autopoplate turned on so it return latest posts on page load. Then we have some filtering with taxonomies. When the taxonomies are set to checkboxes the search will return all the latest results on page load as they are all selected. We would like to use dropdown menus on our search as the options may grow large and don’t want users to have to deselect all the options to filter correctly. The only issue is that the dropdown menus automatically select one option and the results are filtered to the selected option. We want the results to display the latest results then the user can filter using the dropdowns. Is there anyway to have another option in the dropdown for ‘Select an option’ or ‘All’ which will not filter until a proper option is selected?

Thank you
Gareth