I consider myself to be well versed on Macrium Reflect. If you haven't upgraded to W10 yet, I would like to make a few suggestions.
I upgraded to W10; but before I did, I created a image of my C drive with Macrium Reflect. Instead of using the option that the upgrade provided to roll back to W7, I used the image I created with Macrium. It worked with with out a hitch. I rolled back to W7 in about 20 minutes.
I also created a image of my C drive when I upgraded to W10 with Macrium.
I noticed that the up grade created another partition on my C drive, which I believe was where the option to roll back was created. I chose to use my image to roll back to W7 instead. IMHO that is the way to roll back your OS.
I now have the original 3 partitions on my C drive. The partitions with my OS and the hidden partition to restore to factory. I'm back to where I was before the upgrade and all is well. Here's a screen shot of the USB where I have back to factory on the left and a mounted image created by Macrium on the right. You can see they are identical.
I'm not sure when I'll upgrade my W7 to W10 again, but I believe I have all my bases covered when the time comes. I also have a USB with W10 on it and a image of W10 on a external hard drive.
As always, I would like to hear your thoughts and correct me where you think I'm full of it!
PS the screen shot on the bottom is what the USB looks like with W10 on it!!