[beachin]

I have been using Calibre for years and never had a problem until recently.
A few months ago I purchased a new computer and had to freshly download the software.
I have over 1500 digital books that I need to put into Calibre and for the life of me I can not figure out how to do more than one book file at a time.
Is there a new setting that I need to change?
add books - from folders & subfolders is what I always did before. Now, I get a pop up (assume all e-book files in a singe folder are the same book in different formats yes or no) (which is really irritating btw). I click yes. and then I am able to only select one folder at a time.
I have my folders separated by author, then a folder inside for each separate book.
What am I doing wrong?