Use software like WinRAR or 7-Zip to open only the first part (usually .part01.rar ).
Ensure you have the complete set of .rar files for this specific release in one directory. sc23018-DOS2DEv361173735.part05.rar
The software will automatically pull data from part05 and all other segments to recreate the full installer or game folder. Use software like WinRAR or 7-Zip to open