can't erase com.phaseone.captureone8.sfl file

some one can help please ..
i want to deinstall C1 8 completely from my Mac and install C1 9 new
at Phase one Support DB there is a nice construction how to do that correctly
but wen i use it i still cant erase this file com.phaseone.captureone8.sfl !
i am using OSX 10.11.4 version

thanks