You do not have to leave behind your old designs just because you are moving forward with new versions of CADWorx.  We can easily bring these models forward using your newly written specifications in CADWorx.

1.  Open CADWorx 2016 and open your Legacy 2010/2012 model.

2.  Execute the command "CONVERTCADWORXLEGACYDWGS"

3.  Pick legacy spec on the right and pick spec to match it to on the left then select match, you will do this for all specs in the model.

4.  Recommended to click "Backup Current Drawing" also check your apply change data rule to preserve line numbers, colors and other settings that may be overridden otherwise, and then click OK

 Check to see that all files have been converted.