The cost of Library Viewer Pro is only 8€ with lifetime updates and support!
Reasons to buy Library Viewer Pro:
With Library Viewer Pro you can display folders & files of a directory (in FTP) of your choice, not only library directory (yoursite.com/library)
Library Viewer Pro supports comments for each folder/page of the library.
In the Library Viewer Pro you can set the seconds of user is waiting the redirection, as you like (0: for instant redirect).
(With Library Viewer when user clicks to open a file and is not logged in, he/she wait for 5 seconds to redirect in the login page.)
The algorithm of Library Viewer does not show in the front-end folders with name that contains in their name the string "hidden-folder".
Also does not show .php and .ini files and the files with name that contains in their name the string "hidden-file".
With Library Viewer Pro you can set the names of folders & files that you don't want to displaying in the front-end.
If a folder or file contains a space character (" ") in its name, in the url the space is replaced by "–" for beauty reasons.
It is much prettier this link: ...LV/library/my–file.pdf
than this: ...LV/library/my%20file.pdf
With Library Viewer Pro you can set the character of your choice to replace the spaces in the urls.
If you want to use [library-viewer] shortcode more than 1 times in the same page, you can do it with Library Viewer Pro.