I'm the author of a program to rename files. It's UI is like the Windows
Explorer. Actually my program can't be resized and I'm working on this.
But it's hard because my actual UI is full of options (may be a mistake
when I began to create it). I'm searching for a new way to show it.
If someone can help me and/or give me any idea, it will be great !

The actual program can be downloaded from here :

I've made a first version of my program, sizeable, you can see some
pictures of it here :