Absolutely! You can switch templates as often as you wish, your entries will be intact. Think of templates for Connections like themes for WordPress. The primary purpose of a WordPress theme is to change the visual style of your site. The primary purpose of Connections’ templates, just like WordPress themes, is to change the visual style of your directory. Just as you can switch themes in WordPress and not loose your pages and posts because they are saved in the WordPress database, you can switch templates in Connections.