I tested the new code with K4PC 1.28.0 on Windows 10. Unlike the current version there is a delay in retrieving the default key which is different to and longer than what is retrieved by the current version. It may well be the correct key. However, there is no easy way for me to test this. I tried importing a Baen book, Tom Kratman's A Pillow of Fire by Night, which resulted in a kfx_zip file apparently encumbered by DRM. The renderer trick does not work with this version so it seems K4PC will not download an old kf8 file. To summarise, whilst there is some indication the correct key may actually be retrieved it seems the plugin cannot currently decrypt a kfx format book with no further drm over and above the default kfx encryption.
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