You can use it as comand line tool or integrate with any SVN-Git client, such Tortoise
All functions for image and CAD processing are equal to VCE internal Diff command. If you have use the VCE - you don't need to download and configure CAD Diff, it's still a part of VCE
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For whom who want to use the Image diff tool without VCE
CAD Diff is now available as stand alone product too
https://sourceforge.net/projects/cad-diff/
http://soft.postpdm.com/cad_diff.html
You can use it as comand line tool or integrate with any SVN-Git client, such Tortoise
All functions for image and CAD processing are equal to VCE internal Diff command. If you have use the VCE - you don't need to download and configure CAD Diff, it's still a part of VCE