NIOS II 11.1SP2 C2H Accelerator

hello,everyone

Recently, I'm using NIOS II 11.1SP2.

I want use C2H Accelerator in NIOS II 11.1SP2. But when I right-click after double-click the function name I want to accelerate, I didn't find the "Accelerate with the Nios II C2H Compiler" option like 8.0 vertion.

How can I use C2H Accelerator in the 11.1SP2 version?