Short answer: For some very technical reasons, the embedded edition has been discontinued. Unless you are very computer savvy, just know this: the version of the magazine you get now is every bit as good and you will notice no difference.

Just download the new version and be happy -- you will never miss the old, much more bloated embedded edition.

Long answer: (Very technical) The old embedded edition of MRH used embedded Flash media inside the PDF.

Flash media has been declared obsolete and support for it is actively being discontinued. For example, here is how browser support for Flash stands as of May 2018:

The current Google Chrome browser will block Flash and use HTML5 by default, while the current Mozilla Firefox and Microsoft Edge browsers will make users request Flash activation before running it, as described in this Mozilla developer post. Flash is turned off by default for Apple's Safari browser.

Adobe themselves are adding nails to the coffin by removing Flash from their Adobe PDF Reader software:

You need Flash Player to view Flash content in PDFs, PDF Portfolios, and other features. Adobe Reader and Acrobat no longer include Flash Player, and features that require Flash now leverage the machine’s local copy of Flash.

The bottom line, the handwriting is on the wall for PDFs that include embedded media. Such PDFs are called "interactive PDFs" and the growing opinion is that interactive PDFs days are numbered. Here is one recent post on Adobe's support forums:

Interactive PDF is, in my view, dying fast, for three reasons

1. Most people now have a PDF reader with their computer or browser. The number of people who still need to download Adobe software is dropping off a cliff; really, it's confined to stuck-in-the-muds with Windows 7 and older, who don't install their choice of browser.

2. Adobe chose to book interactivity onto the Flash Titanic. More directly, Adobe chose to build their interactivity on a proprietary platform when it seemed unstoppable, but now - because it's not available on mobile platforms, and widely blocked for security reasons - the interactivity is less and less available.

3. Even without Flash, Adobe decided not to go for feature parity on the platforms of the future (i.e. mobile). By now, if it had been resourced, the Acrobat Reader app on mobiles could have been a contender. Still, Adobe may have been right. Since the mobiles come with a PDF reader, and the default can't be changed, how many users would take the trouble to install the app and send files to it (even if they knew how).

Don't just take my word for it. See this excellent discussion: It's okay to say no to interactive PDF

And then there's this very technical article that proclaims interactive PDFs as dead and offering alternative technologies (which we may explore for the future):

https://ajarproductions.com/blog/2018/03/26/interactive-pdf-is-dead-heres-what-you-can-create-from-indesign-thats-even-better

In summary, we've discontinued the embedded edition because it's becoming a support headache and on track to stop working entirely someday soon.

P.S. If you're technically savvy and you want the media and the PDF all together in a single download, then you can go to the Bonus section and download a zip file that includes the regular PDF and the media all together in a single folder. If you don't understand what this means, then don't bother. The regular PDF is all you need and you will notice no difference between it and the old embedded edition.