How can I view all images in all sub-folders in a master folder ACDSee Beta 4 Mac?

[fallonphotography]

Hi all, this is a pretty basic question but I have searched the forums and Googled it and can't find a solution. So here goes nothing...
How do I view all the images in all the sub-folders contained within a particular master folder in ACDSee? I have figured out I can shift click to select all the sub-folders, but if they contain more sub-folders all ACDSee shows me is a whole bunch of folder icons and names. (While I'm at it, does ACDSee Beta for Mac have an advanced search function? The quick search seems very basic...).

[Alaric]

I have a PC... Maybe you can do it... Look at the screenshot.

On the folders pane, choose your master folder.
> Search pane : Click on "specific folder" / click on "Sync to file..."
The path is displayed below
Click on "Start".

Alaric (French)