You can download it at http://www.prestosoft.com/download/ed17_setup.exe (EXE with installation -- 503 KB), at http://www.prestosoft.com/download/ed17_setup.zip (ZIP with installation -- 485 KB) or at http://www.prestosoft.com/download/ed17.zip (without installation -- 224 KB).
Here's what's new in 1.7:
- New feature: File names in the caption
- New feature: True-color toolbar
- Bug fixes: Clicking the ExamDiff status bar always opened ExamDiff Pro web page