Unzip the file "BootStar.ZIP". It contains the following files:
BSDOS.EXE Program for DOS
BSDOS.HLP Help file / manual for DOS
BSWin.chm Help file / manual for Windows (CHM)
BSWin.cnt Supplement for the Windows help file (HLP)
BSWin.exe Program for Windows
BSWin.fts Supplement for the Windows help file (HLP)
BSWin.hlp Help file / manual for Windows (HLP)
FreeDOS.bin FreeDOS binary files
Manual.pdf Manual in Adobe Portable Document Format PDF
ReadMe.txt Brief description of the bootmanager
Both programs are completely compatible. The only difference is the operating system (DOS / Windows) under which they can be started. All other items (functionality and menu structure) are completely identical.
After all files have been unzipped, you can start the correct program directly.
However, you should first plan your system well, because it is very difficult to modify the configuration (partitions) at a later time.