Open Progus Store Locator.
Navigate to Settings.
Access Locations List.
Choose Sorting Method:
By Name (A to Z)
By Name (Z to A)
By Priority (Lowest to Highest)
By Priority (Highest to Lowest)
By Added Date (Newest to Oldest)
By Added Date (Oldest to Newest)
Custom Order
When you choose this option you will see the "Set custom order" button. After clicking on it you will see a page where you can manually manager order of locations by drag & drop locations on the list. Finally remember to click "Save settings".
Click "Save settings" at the top of the page.