Recovering Calibre Windows 64 after disk crash

My windows 10 drive failed and nothing is recoverable. I need to recover my original library.

I took the following actions before performing a fresh install of Calibre 64 for Windows:

1. installed Windows 10 on a new drive.

2. Restored my Calibre folder which contains the sub-folders Calibre 64 created to store all of the books I added.

3. Performed a new install of Calibre 64 which created a empty library folder in My Document and additionally created and populated a Calibre folder in the path: C:\Users\user_name\AppData\Roaming\calibre.

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I have a backup of the original folders and files in the Calibre folder from the path C:\Users\user_name\AppData\Roaming\calibre\. I am able restore those folders and files over the fresh install if necessary.

What are the steps to recover the books from my previous library?

Thanks, Richard