Could you restart from the beginning?
Just restore the library backup file and disable the auto-importer so that it can't do anything while the library is fixed.
Copy the media files to C:\My book\ with Windows Explorer (if they are not there already).
Inside MC select all files and use the Rename, Move, & Copy Files tool for changing the base path. I have posted step-by-step instructions here:
http://yabb.jriver.com/interact/index.php?topic=55224.msg375699#msg375699If you have cover art files in the default location (i.e. not in the same folders with the media files) you must copy them separately.
EDIT
I modifed my instructions to fit your folder structure:
- Select the files and use the Rename, Move, & Copy Files tool for fixing the base path:
a) Select the correct mode:
Update database to point to new location (no file rename, move or copy) b) Untick the Directories and Filename options
c) Define the path change in the Find & Replace section:
Find What:
H:\ Replace With:
C:\My Book\ (take care that both strings have the correct number of backslashes)
d) Check that the preview section shows correct new filenames and press OK.