If you're not sure which version your Works file is, try the Works 6-9 Document (*.wps) option first.
Select the appropriate version of Works for the file you are opening.
In the Open window, in the File type drop-down menu or the unlabeled drop-down menu next to File name are: Works 4.x (*.wps), Works 6-9 Document (*.wps), and Works 6.0 (*.wps).
In Word 2016 and later, after clicking the Open option, you need to click Browse. In Word 2013, after clicking the Open option, you need to select Computer, then click Browse.