This is a heads up for those using bookwalker ripper;
I'm not entirely sure how but I my account got blacklisted after upgrading to ver1.2.3. (I confirmed this via bookwalker support)
I had yet to download / use the new version rip tool, so I'm guessing the new version has an function to check if the previous version was tappered with.
And before someone asks I was able to login via web browser right before I upgraded, and after that I wasn't able to anymore.
Well, thanks for the heads up.
And I don't really want to play the ass here, but this is almost certainly your very own fault.
You knew that the tool is tampering with original files, therefore you should have made a backup.
My usual steps were:
Download the desired book and close the program without logging out.
Make a backup, copy the patched files over, block its access to the internet (you do not need it after all if you do not log out), and start the program to proceed with the extraction.
Afterward you simply close it again and recover the original.
I wasn't blocked; bought and extracted novels when 1.2.2 and 1.2.3 were active (and even earlier).