Configuring directory for a single country only w/ different provinces & cities

I have been using Premium Press Directory for years. And with the latest released framework, I am trying to upgrade our directory to the latest. In the old directory, I was able to edit the name of the countries into provinces and cities to create a single country directory. However, with the latest version, I am having a difficulty on how to do it again. I have already imported our old listing and categories successfully to the new theme. But the locations are not showing up in the search filter. My questions are:

1. How can I make the latest directory version to work as a single country directory only? For example, Singapore only?
2. How can I edit the search filter into different cities, towns and provinces, instead of countries? How to remove Singapore, since it is already understood that the directory is within Singapore only?
3. Is there a way to predefine the cities, towns and provinces as one of the clickable choices for a business location in the add listing page? So that user will just select a drop-down of cities, provinces when they add a listing?

Thank you.