You really dont want to waste time trying to fiddle to get the cycle button back... QV just has nowhere to place it.
I recommend you use an input box or a listbox where the user chooses which expression to view and then use the expression conditional display to show the correct expression (assuming you are in QV11).
I'm afraid this is a bit of a draw back of the pivot table, when you format the table in this way the cyclical button disappears - an annoying bug that's caught me out. Conditional Display is not available for the pivot table - at least not on version 10 which I'm currently on.
My solution was to create a listbox for a data island (as Adam suggested) and use this to drive a single expression. Within this single expression, each of your previous expressions are calculated (but only if they are selected in the list box - I used a variable for this) and added together.
I also put some text in the header that was dependent upon this selection, so the use always knew exactly what calculation they we looking at.
I hope this helps.