There is, it's just not the backspace key because RPG Maker 2003 is a little dumb. The ESC or X keys delete characters, I'll consider making a more obvious note of that in a future patch.
That's where the "load" function would be in RPG Maker 2k3! Sadly there's some limits in the engine I used and I couldn't take it out-- there's no secret mode or anything, haha. Glad you enjoyed!