Compare 2 SolidWorks drawings

Hi,

I have 2 SolidWorks drawings that are slightly different.

I want open up both drawings and have one highlight or identify what the difference's are.

I thought I could use the function DrawCompare however when I click on this it does not do any thing.

It will let me choose features / geometry etc, but then I have to open a part file and not the drawing file.

I have done a search and think that it does not work on 64 bit machine ( I may be wrong).

How do you go about comparing 2 SolidWorks drawings to see changes etc?

Thanks

Mark (SolidWorks 2014)

SolidworksDrawings And Detailing