I haven’t tried this, but this is what I’ve read:

You can highlight the redacted text, copy it, and paste the text into another document (like Word, WordPad, Notepad, etc.).

Another method I saw mentioned on Facebook:

“The backgrounds are transparent. Pull them into photoshop and throw a layer of white between the text and the black background and you have your text.”

If anything is unclear, please ask. Even if I can’t answer it, maybe someone else can.