NB 8.2 What is the difference between app.exe and app64.exe when you use a 64 bit JRE ?

I see it set in the ConfigurationLogic.java from property CL.app.name which is set to {product-simple-name}. A HACK which did the trick was to use  

    public static final String EXECUTABLE_WINDOWS =
            BIN_SUBDIR
            + ResourceUtils.getString(ConfigurationLogic.class, "CL.app.name") + "64.exe"; // NOI18N


in that Java file.    Not nice - but did the trick.