@chaley: I'll take a look at it in a bit, I am currently in the middle of something I would like ot finish first.
@Tanjamuse: I suggest deleting a few of your composite columns, especially the one that uses the virtual_libraries function, as they are performance killers. You should be able to do that from the command prompt like this
calibredb remove_custom_column columnname --with-library "c:\path\to\the\problem\library\folder"
Replace columnname above with the name of the column you are deleting, you can get a list of names, like this
calibredb custom_columns
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