How to convert PS to PDF on Windows 8.1 ?
1. Start GhostScript
2. Select a PostScript file with the extension PS
3. Select from main menu "File"->"Print"
4. Select Printer "PDF Printer"
5. If you need to adjust PDF generation options, click the "Property" button on the right
6. Click "OK"
7. A dialog will pop up, assign the folder or file name of the PDF document to be generated
8. Congratulations! You have converted PostScript file to PDF document now.
NOTE: PostScript language level 2 and level 3 are supported.