File Set Viewer - view and compare multiple files at once

File Set Viewer is a simple utility that allows the user to view multiple files at once and compare their contents. It displays each file as a row of hexadecimal values. It can also optionally display the data as text. (Non displayable characters are displayed as blanks.) Columns where each file contains the same value at the same point are highlighted. This program should come in handy when analyzing different file (-headers/-footers) of the same type which have related data at fixed points.

Note:
This program was initially made for personal use only, this means that it is rather basic and a bit rough around the edges. Still, I hope others will find it useful.

EDIT:
-Made some improvements to the interface.
-Several bug fixes.
-Added a feature to export the data being viewed to a comma delimited file.
-Files can now be viewed backwards, this should be useful for comparing footers instead of headers.
-Added a feature which allows files to be sorted by their data.
-Added a bit inversion function and the ability to shift the data's byte values.