The filename "FL.exe" indicates that this file is of type "executable". The contents of the file indicate that the file is of type "DOS/Windows executable". If you open this file, the file might present a security risk to your system.
Do not open the file unless you created the file yourself, or received the file from a trusted source. To open the file, rename the file to the correct extension for "DOS/Windows executable", then open the file normally. Alternatively, use the Open With menu to choose a specific application for the file.