All the ones in the video in the second link you give were replaced by the DeDRM plugin from your first link, produced by the same person/people as the earlier plugins.
In short: You want the DeDRM plugin (or the obok plugin for Kobo books).
As for trusting the software - the software at Apprentice Alf's blog is either Python, AppleScript, or compiled C with source. You can check it all easily. There are no binaries without the source.
Note that detailed discussion of how to remove DRM is not permitted at MobileRead. Removing the DRM from library books is considered piracy here, and possible methods for doing so may not be mentioned here at all.
Last edited by pdurrant; 11-15-2015 at 06:12 AM.
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