Hi!
The issue is a simple z-index problem. The Pro version has an additional fixed position detection, where the z-indexes might be different. The issue here, is that the results container is simply not visible (as the menu hovers over it). To fix that, go to the Theme Options -> Custom CSS panel, and change the z-index value of the results box to 9999999: https://i.imgur.com/pgAKTcO.png
..or if that does not help, just use this custom CSS:
[html]
div.asp_r {
z-index: 9999999 !important;
}[/html]
Don’t forget to clear your site cache, if any. This should solve the problem immediately.