How can I select folders to add to my iTunes all at once?

Question

I have all of my music based in a separate folder from my iTunes, and it is also backed up on an external hard drive in the iTunes library because I have my preferences set to "Copy Files to iTunes Media folder when adding to."
The problem is, when I click add folder to Library, I can only select one folder at a time.  I want to add multiple folders, but not all  of the sub-folders that are contained underneath the same folder.  I used to be able to do this, with a window that allowed me to use the ctrl key to select multiple folders.  I used to click the folder everything was in, and it would open that folder so I could select the certain folders I wanted.  Now, I get a window only with a + next to folders that opens up the subfolders and I can only select one.
How do I get back to the other style of window?  It is not my version of iTunes because I have updated it on all of my computers/laptops, and the one laptop I use iTunes with the most is the only one that gives me this problem.  Moving my music folders (or even copying them) to a new folder to add them is not an option.  I am dealing with too much music and I'm not willing to waste that much time, especially when I know there is an easier way that I used to be able to use.

Answer 1

Hello rudyray,
Thanks for the question. After reviewing your post, it sounds like you want to adjust view options. I would recommend that you read this article, it may be able to help the issue.
OS X Yosemite: Ways to view items in Finder windows
Further customize Icon, List, Column, or Cover Flow view
You can customize each view to accommodate your preferences. For example, you can change the text size of file names and, in some views, change the size of file icons. 
Select a folder in the Finder, then click a View button: Icon, List, Column, or Cover Flow.
Choose View > Show View Options, then set the options you want. 
To have the folder always open in the view, select the “Always open in” checkbox.
To have subfolders also open in the view, select the “Browse in” checkbox.
If a subfolder opens in a different view, select the subfolder, choose View > Show View Options, then deselect the “Always open in” and “Browse in” checkboxes. The checkboxes must be selected for the main folder and deselected for the subfolder. 
To use these settings for all Finder folders that are in this view, click Use as Defaults.
For example, if you set options for Icon view, then click Use as Defaults, all folders in Icon view appear with the same options. Use as Defaults isn’t available for Column view because the settings apply automatically to all folders in Column view.
Thanks for using Apple Support Communities.
Have a nice day,
Mario