SOLUTION - thanks to @steveo for the suggestions.

For some reason, if you leave the default eehack folder as: C:\Program Files (x86)\EEHack,
The .eedata files and any CSVs you save will NOT be visible in the Windows file explorer menus.

The solution is to change that folder to somewhere else, like in My Documents. To accomplish that,
  1. Open eehack.
  2. Click "Settings"
  3. Under the File Options section, click "Set Directory" and change the path to a different folder, like in My Documents.



If you already have a bunch of logs saved in the default folder, you'll need to move them from within the EEhack file dialog window. To do that:
  1. Click the "Load" button on the upper right side of the main screen.
  2. Within that window, select the files you want to move and right-click "cut".
  3. Navigate to the new folder, and right-click "paste."



Steveo and I aren't sure why this is happening, but this is the fix for it.