I cannot personally verify it works but people report it does work by doing the changes with a Hex editor. Any way will have a risk and the OP needs to have full backups.
If you look at the OP's screenshot from diskmanagement and BFK's from PW. PW only shows the whole of the dynamic disk not the components. I now feel the changes will require a Hex editor. It's easy for me to say it's easy, but I think it may freak out the uninitiated.
Now the good news courtesy of Jonathan King who gave the following link in the tutorial thread. It's an older version of PW which should do the conversion automatically. Jonathan King link to V4.2
1) download the zip and extract
2) run the installer
3) start the application
4) select the disk and go to "Disk" drop down menu
5) select "convert dynamic disk to basic"
It should be run from the desktop. Again do at your own risk.