Firstly, yes the generally recommended version of ADE is 2.01. DRM removal works with it, and it works with all (I think) places that you can download book with Adobe DRM.
But, it has nothing to do with Amazon books. Amazon does not use ADE in any way at all. If you want to get Amazon books to add to calibre, then use Kindle for PC (I think that's the name). Or get them from the Kindle.
For the rest, you need to go to the source of the DRM removal tools and ask. The rules of the forum mean that we cannot discuss DRM removal.
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