Hi Mrs. Poddytat*,
One of the main differences in the WB5 application (appearance) is the whole "menu" for installing/uninstalling/apply this theme/edit etc.., if you look closely at the main window of WB5, right in the middle of the theme that's "featured", is the menu. Underneath the 'featured or installed' theme, are two buttons; one's a 'tree view' button; the other is 'refresh'. I've found that you have to use the 'refresh' button quite often at times.
Also, on a second note, maybe a somewhat 'bug' or not, but when applying a new theme, if you happen to still end up with the old-style task bar, you may need to hit 'apply' a second time, and it will changer as per the skin being applied. At least it's worked for me, numerous times.
Good Luck!
JoeyLee*