The program is ever expanding. I look forward to the day when we no longer need hex editors.

Have you considering implementing editing functionality? At the rate at which you work, I can definitely see this becoming a fully fledged editor/parser.
The stand-alone .exe works fine, although I don't see those monster images anywhere. However, the .exe in the .zip-archive is a mess. It gives me an error about Dark Knight Kain's ROM, and I get access violation errors all the time when using the Monster viewer. According to file info, it has version 2.2.0.0 whereas the stand-alone .exe has 3.0.0.0.
The AI viewer is pretty neat. Nothing wrong with it as far as I can tell.
Sadly, the monster names are displayed incorrectly for FF5: Ancient Cave. This is because that ROM stores the monster names in a different location (probably the same place as the Jap. version). Not much we can do about it though.
The monster indexes confuse me. One seems to be the monsters' position in the list; the other reflects the true index, except some of the monsters have the same value (e.g. Neo-Exdeath's parts).
I would like to see Weapon names in the main area of the Weapons section, Armor names in the main area in the Armor section and Monster names in the main area of the monster section. This would enable us to copy/paste the names.
Displaying header information would be useful as well.
The overall design seems good. I like how you can quickly change sections on the left side, and hide/show advanced info on the right. Resizing areas and the main window seems to cause a lot of issues, so you might want to consider disabling resizing altogether. Just a thought: You could add a separate section for program settings, such as resizing and displaying raw data.
Some issues:
- When you resize the main area of the Monster viewer the program will sometimes crash. Resizing it too small gives you a non-fatal error.
- If you open a ROM, go to the monster viewer and immediately click on the "info" buttons, you get a non-fatal error. If you instead try to resize the main area in the monster viewer, you get a different error.
- If you hide advance info in Weapons/Armor then go to the Monster editor, the main area becomes tiny.
- Trying to view the Monster info for Minotauros gives you a non-fatal access-violation error.
- The Thunder Rod has an odd glitch (see attachment).
- If you click on Info-hex followed by AI-hex, or Info-dec followed by AI-dec, the Info buttons "turn off". However the info still shows up in the main area as if they were "on".
- I see the list of monsters stops at index 368. According to the ROM map in the wiki, the monster data section has enough space for 384 monsters. This might be a problem with ROM hacks that use all of the space.