Hey there!
I wanted to say "Thank you" for creating this plug-in for Calibre. It's really helped me a lot.
One thing I'm not sure about if you were aware of: If you come across the add-on in the "add-plugins" section of Calibre (as I did), the plug-in does not include the .csv and .ods files.
I was reading through the documentation and it made me kind of crazy to read "comes with a functioning spreadsheet" but there was none to be found. I'm not sure if this is something of my doing (some kind of security issue with Win8 calibre/my anti-virus etc that deletes all .csv sheets that aren't directly placed within the plug-in or w/e) or why that happened. After I searched the net for it and came across this post.
I downloaded the entire pack here again and found the spreadsheets.Where are they supposed to go to if you get the plug-in via Calibre itself? Because if you install it through calibre directly, there are neither found in the library, nor in the calibre folder nor with downloads or documents or anywhere else for that matter. I've had my PC search for it and it gave me the no-no on advanced search. But within the package I downloaded here I saw them directly and then took them to to my library manually.
Also I was kind of wondering if there's a chance to put the sheets into the library folder instead of leaving it in the general documents folder. Once I put it into a folder the plug-in can't detect it apparently even if it's standing right next to the metadata of calibre data-file.I'm a bit messy with my documents folder (one of the reasons I'm using calibre for at least a lot of stuff... <_< ) so I'm afraid to accidentally delete it, if it's not nicely put into the calibre folder.
A minor related thing that I came across once again when editing the authors list for the plug-in:
I was wondering if there's a plug-in or w/e that could help me extract lists (for example of authors) in spreadsheet form. I've yet to come across one and I think it'd be totally handy for mass-editing meta data in excel/libre office. While I've caught up with most of the excel formulas and such to help me mass-edit (for example crap that comes when you import a lot of data and have lots off "Mircosoft Word-authornametitle.pdf(insertwebsitehere.com)" or "34682710123-author-title". On a spreadsheet I can (more) easily single those things out automatically and let the program delete everything that's for example 8-10 Numbers in a row in one column. Or if an author name is hidden somewhere in the title I can easily make that into a "what-if-then" argument in Excel. But I'm pretty much helpless when it comes to calibre/python/regular expressions. So being able to import/export lists like that would be amazing. Is it possible to access the data shown when you go for "manage (author/tags/series/...)" in a spreadsheet way? You cannot mark more than one point on the list in calibre. I think this would be really easy and helpful for people like me who are not that good with regular expressions etc. And it'd make the whole tag and author list more easy. Entering every Author name by hand can be tiresome if you have over 20k books in your library and use it for both private literature as well as university books and cooking guides.
If there already is such a thing and my question seems stupid, I apologize and would ask you to kindly point me the right way anyways.