I propose adding two constants to Application like:

[1/22/13 4:37:05 PM] Jasper Potts: public abstract class Application {
 �� ��/**
 �� �� * Constant for user agent stylesheet for the "Caspian" theme. Caspian
 �� �� * is the theme that shipped as default in JavaFX 2.x.
 �� �� */
 �� ��public static final String CASPIAN = "CASPIAN";
 �� ��/**
 �� �� * Constant for user agent stylesheet for the "Modena" theme. Modena
 �� �� * is the default theme for JavaFX 8.x.
 �� �� */
 �� ��public static final String MODENA = "MODENA";

So that in your application you can just say:

public void start(..) {
.....
 �� �� �� �� �� �� ��setUserAgentStylesheet(MODENA);
.....
....
}