[1] 555 people have downloaded the .txt file, and until now there have been no complaints. If there is a typo, it must be trivial and easily correctable. I haven't used or looked at it in ~3 years. Actually, since then, Calibre miraculously added new functionality to obviate the need to use it. See Preferences > Look & Feel > Create Rules to Convert Identifiers into Links.
[2] The LC Genre submenu has a menu item to specifically import a .csv file to add/change the mappings. The original .csv file is attached to the Original Post. See
https://www.mobileread.com/forums/sh...11344#poststop for a user-submitted French version.
[3] LC code downloads have no time-based execution limits other than the elapsed time it takes to actually execute the web queries. To avoid burdening the various web servers, LC paces itself.
DaltonST