Not sure if you’d had this question answered for you but the answer is both yes and no.
Unless you output it as an iges/step/CAD-Neutral file WF 2 cannot open a WF 4 file.
However, if you download the Cross-Release Interoperability plug-in (from the PTC site I believe) you are able to open files in WF 2.
The main limitation to this is the file opens up as read only – the existing features are displayed in the model tree but aren’t editable.
For more information read up more on Cross-Release Interoperability (CRI) from the PTC website. I will try to attach the PDF with more information on it as well.
Best Regards,
Gabriel Mantaring Applications Engineer, TriStar, Inc.
Thanks to all that replied. I was able to install the Granite plug in without admin help. I opened the files and was on my way! Best Regards, Doug Northrop Grumman