Rethink the application interface.

I know this may be unimportant for some people, but usability should be as important as a program's features.

The program doesn't seem very well designed (layout wise for example, but graphics as well (e.g. think HiDPI screens)). Also themed borders is something not very "now", integration, a sense of unity with the OS style is on the other hand (i.e. it would be better to use regular Windows theming for the borders of the window, buttons, etc.).