C#Script language option missing
They are still there... in both versions.
It depends, somewhat, on what path you use for creating a new project. If you go to Fille -> New Project, you won't see these. If you create a new PRoject Suite and then right click on the suite and select "Add new item" you'll see these ooptions.
Technically speaking, under the covers, C#Script and C++Script are just JScript. You can use JScript and still use the syntax for those other two... they are interchangeable for TestComplete.