In the "File Manager" selecting a file then clicking the OK button causes the contents of that file to be read into the program to be used wherever appropriate for that type of file.
For example selecting a file of the "Displayed Points" type, called (say) "plan&ast.pts", updates the list of points that will be displayed on any subsequently drawn chart with the points in this file. This file now also becomes the "current" file wherever this type of file ("Displayed Points" type in this example) is used in the program.
If the "Current Settings" panel on the Main Screen displays the current setting for this type of file, then as soon as it's selected it's name is updated in the "Current Settings" panel showing it is currently being used (e.g. for "Displayed Points").
>> To select a file
•Select a file from the list of file names and click on the Select button, or double-click on a file on the list of file names.
If you are selecting a chart file, then you also have the option of choosing a folder to look in first. After file selection, the "File Manager" screen is hidden.
Note: If you need more space to see long file or folder names, then re-size the dialog box by hovering the mouse over a border until the cursor is a left-right arrow, then click the left mouse button and holding it down, drag the border to the desired position, then release the mouse button.