yes, this is exactly the case. in the popup RA and DEC = 0 (it's also visible in the log)
for .net details :
On my windows 10 where it does not work , I have .Net 4.0 (or 4.1, I don't remember) to 4.6 installed
On my windows 8 lab where it works, I only have .Net 3.5 (without any other update installed)
I will try to install .Net 4.x on my lab this evening, but should take a while ... I give you an update with the results after it's done.