Made this very simple plugin
here to give me a way to import some metadata into Calibre columns from a KOreader library folder. Seems to work alright for syncing up my read % and last read dates but I noticed that for some reason the plugin appears twice in Calibre's list. (Both the GUI and the calibre-customize -l one)
It doesn't seem to have an effect on its function that I can see, but it makes me feel like I screwed up in configuring it somehow so kinda curious if anyone knows what I did wrong here. Plugin is just a single Python file with the code as shown on that other forum post saved as __init__.py in a folder and imported using calibre-customize -b "C:\Path\To\Folder". Tried removing it a few times but it still gets duplicated when I add it back again...