Can't dedrm AZW anymore with Calibre plugins
I have Calibre and K4PC version 1.10.1 and all the plugins for drm removal (tools_v5.3.1) in Calibre. For a while I noticed Calibre won't de-drm AZW files anymore, AZW3 is not a problem, Mobi works fine as well, its just the AZW. So how can I solve that?
Do I need to install another version of K4PC? A newer version won't work at all, I was taught to uncross the download new updates box.
Hope to hear from you,