Older spreadsheets files from DOS version of Quattro Pro (for example .wq1) are still supported in the modern version of the program (Corel Quattro Pro), so it shouldn't be hard to simple re-save them to some modern format like Excel's XLSX. Unfortunately, we do not know about any program other than Quattro Pro capable tof handling wq1 to xlsx conversion at this time.
Open WQ1 file Open XLSX file