Cannot select ACIS version

I am trying to export an ACIS 12.0 file from SolidWorks. Nomatterwhich version of ACIS I select, the resulting file always hasthisin the header:

15 SolidWorks 2007 14 ACIS 16.0.6 NT 24

I tried selecting ACIS version 2.0, 12.0 and others. Thefileheader always says it's 16.0.6

Anyone know how I can get the proper ACIS versionexported?Solidworks3d Contentcentral