Why I can use only specific version of Oculus runtime?

I can use any runtime version except 0.5.0.1 because of unknown reasons.

I have Oculus DK2 that was bought in December, 2015.

I want to combine Oculus 0.5.0.1 and UE4.9

OR

coerce Oculus to work with most modern SDK/runtime. (1.6 is last, isn't it?)

The last is much more preferable.

I just want to discuss why it could happen, what should I do, and get some links or files which may allow me to use OculusVR in more adequate way.

p.s. I used an "Dr. Kaii's  Oculus Runtime Switcher V3" , to determine ability of using each version.

p.p.s Is it true that "version of runtime" and "version of SDK" are interchangeable in meaning?

p.p.p.s The weird fact: for a little time I could use 0.6.0.1, but something was not working, (I don't remember what exactly) and after updating my firmware (to 12th) I loosed an ability to run 0.6.0.1. :-)