The issue was not insufficient rights. I was using my admin account and using run as admin and had checked the permissions on the files in question. The issue was more likely to be registry damage on my end. Still a local issue but not one that can be solved with a simple right click.
Second, I don't know about the portable version but the executable version has definitely modified my . ocx and . dll files ensuring they are all up to date and correctly registered. This fixed the problem. As my computer has none of the other issues (decimal seperater issues for example) that can affect Aurora, I can actually run Aurora fine now using either executable (the Aurora or wrapper . exe). Hence, I, half-jokingly, wondered if the original installer might now work.