The display is organized as a tree, with two main branches -- tide sites and current sites (each of which represents a reporting station). Beneath these categories are countries/regions, states/territories, and individual sites. Your configuration presently defines [totalSites] sites of all kinds.
To open the tree, you can click the handles to the left of the file folder icons, or you can choose "Expand" to open the entire tree. This is actually not a terribly efficient way to look for a a paticular site, but it is fun to browse.
To quickly locate a particular place by name, it is more efficient to enter a keyword and click "Find" () or press Enter. The search algorithm accepts partial words and is not case sensitive. Once a particular site has been found, simply click the mouse cursor on the site to open a display of that site.
You may want to locate more than one site that matches your entered search string. To do this, press "Find Next" ().
It is also important for you to know that your site choices are remembered when you exit JTides, and are reloaded when you run JTides again. You can also redisplay a previously displayed site by choosing from the list at the bottom of the file menu.
To switch from one open window to another, press Tab, or use the open window list at the bottom of the Windows menu item.