Problem in installing butterfly

Hi all,
I have a problem in installing butterfly. I have downloaded and successfully installed the blueCFD core in the default location. The problem comes when I try to install the butterfly. After downloading the butterfly installation from food4Rhino, I open the installation file and click the false button, then it turns red and said that it couldn’t find the butterfly folder in the installation folder. It asked me to download the installation package from food4Rhino. It still happens even though is the butterfly folder is there, and I already download the installation package from food4Rhino. What should I do to solve this problem??

Thank you very much for the help.
note: I have experience installing butterfly previously on a different computer, and there is no issue.