Nice little program, but I have a few suggestions -
First, it would be nice if the é actually displayed as such, because it is quite consistently something else in a lot of places.
Second, if it faded in quickly, rather than just turning on and off like a switch, it would look better.
Third, it would be a lot easier if you could paste in the license code rather than having to type it out. ( on that note, the program said it was valid when I still had two characters to type in. Odd.)
Fourth, as was already said, it would be nice if it was invisible - No dock icon, no menu bar item.
Fifth, there isn't much point in being able to activate it from the menu, because if you can access the menu item, you must have use of your mouse, no?
Aside from that, it's a great program, and I'm sure I will get lots of use out of it.