Not big deal though, just thought it would be helpful reporting that while ExamDiff Pro is in beta stage.
1. Sometimes, while viewing differences in two text files, the whole toolbar, menu and diff combo box, appear grayed - non focused, although every button and command works and can be selected with mouse.
2. In "Options - Display - Dir Columns", Time column listbox is misaligned (drift right). In same panel, column listboxes aren't spaced equally (vertically).
3. I've added two buttons in toolbar (Add to first and Add to second).
Then i was trying to reset customization to defaults, using toolbar context menu "Reset To Default". Toolbar reverted to defaults but that cannot be saved. When ExamDiff Pro restarts, toolbar appear with those my previously added buttons.
BTW removing manually those buttons from inside "Customize Toolbar" dialog, works just fine, saving changes.
I'm not sure if that is by design or bug.
Besides the above, new beta works just fine

Regards