Welcome to Reflect!
Macrium Support can help you reclaim that license. That's not a big deal at all, or even that infrequent, since the exact same end result occurs if a user's PC dies unexpectedly and they don't have a full image backup of it and/or wouldn't want to restore that image wholesale onto a replacement PC.
In terms of Rescue Media, as of this writing, if you want to use WinPE 10, Reflect downloads WinPE 10 1709. Prior to that it was 1607. Macrium moved to 1709 because that was the kernel where Microsoft added support for multi-partition flash drives. To my knowledge there have not been any improvements in subsequent WinPE releases that are relevant to Rescue Media. But if you want to be on the latest and (not always) greatest, you can use the WinRE option. That will cause Reflect to use the WinRE environment on your system's Windows Recovery partition. That sidesteps having to download anything, and if you're running the latest release of Windows 10, you'll have a Recovery environment built on the same latest kernel. And in fact WinRE is the default choice. However, I tend to recommend against it. I wrote this post elsewhere to explain why:
There are really only a few reasons to consider WinRE:
- You're the type that just uses the defaults. (And in fairness, most of the time the default works fine.)
- You need WiFi support in your Rescue Media.
- You can't spare the necessary storage capacity to cache a WinPE build (WinPE 10 1709 is about 1 GB).
Otherwise, WinRE is pretty much all risk and no reward. The problem with WinRE is that it gets updated whenever you update your full Windows environment, and Microsoft has a particularly poor release quality track record these days. The initial release of WinRE 10 1809 for example contained a bug that broke Rescue Media's automatic driver loading at startup. They could still be loaded manually by users who knew how, and this bug was fixed when Microsoft recalled and then re-released Win10 1809, but the early adopters who were using WinRE ended up with broken Rescue Media. And WinRE can also get customized at an individual system level, which makes it even more of a "moving target", which has resulted in some users having problematic Rescue Media builds.
By comparison, when you use WinPE 10, Reflect always uses WinPE 10 1709 (as of this writing), regardless of what release you're running. That's a release that Macrium tested, and the WinPE package downloaded from Microsoft does NOT get customized on a per-system basis before Reflect gets to it. So with WinPE 10, you're always giving Reflect a consistent, Macrium-tested "foundation" to build from. Consistency has its virtues over "latest and allegedly greatest" when it comes to critical recovery tools, in my view.
All that said, if WinRE works for you, then fantastic. Just make sure you retest your Rescue Media if if ever rebuilds because the WinRE version on your system has changed. (And honestly, you should retest your Rescue Media any time you rebuild it, regardless of why the rebuild occurred or what version of WinPE/RE you're running, because there have been Reflect updates that broke Rescue Media too.)