How to uncomment Sensirion.cpp file

I downloaded the Sensirion 2.0 from Arduino Playground. The "Helpful Hints" suggests to "uncomment" an "#include..." line in the code. The file doesn't allow me to type the "//" in front of the line. I have "read and write" permission to the file.

I would appreciate your advise.

I made changes in liberary and shared Here. It is working fine now.Put into your library file replacing older one.

Sensirion.rar (8.95 KB)

Thanks! Could it be also deposited into the Arduino LIbrary?
(I would still like to know the way to "uncomment" a .cpp file.)

afterthought:
Thanks! Could it be also deposited into the Arduino LIbrary?
(I would still like to know the way to "uncomment" a .cpp file.)

(I would still like to know the way to "uncomment" a .cpp file.)
Just open it it any c compiler like visual studio/dev c++.Open header file or c file where it being declared . Then comment it out and save it