The files are not DRM. The pdfs are articles or books I have had for years. I still have lit files from years ago that i never converted but now some wont open. Some open some do not. My system crashed and I salvaged what I could from the hard drive. I guess in the crash and salvage some files just wont open anymore. Trying to find the quickest way to see what's good without having to spend hours opening each file one at a time.
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