Hi Nitin! :-)
I think it means that KDE for Windows has just wiped out, for making room on their Attic! :-)
It was a good project, but unfortunately it's now dead! :-(
Officially, it's still alive, but only as stand-alone installers in beta stage, for specific programs (and KTurtle is NOT one of them). :-(
Personally, I tried most of them and I kept only Kate (x64).
Does anyone else knows any more details?
Any viable alternatives for Windows?
Personally I heard about Libre Office's LOGO, but I didn't try it so far.
A.