In the "Fixed Star Editor"...
>> To open an existing file of fixed stars
•Select the Open option from the File menu.
If you have made any changes to the current file, then you will be prompted to save them before a new file is opened. When you select this option, you will be presented with a file open dialog box from which you must select the required file.
Solar Fire star files have the file extension “.fst”. It is only possible to open files of this type. If you attempt to open a file of a different type, then a message will be shown indicating that the file cannot be read.