There are a few potential reasons why Attribute Changer might not be working as expected:
-The file or folder you're trying to modify may be open in another program, which can prevent Attribute Changer from making changes. Try closing any programs that might be using the file or folder, then try again.
-Attribute Changer may not have the necessary permissions to modify the file or folder. Try running Attribute Changer as an administrator and see if that makes a difference.
-If you're trying to modify the attributes of a system file or folder, you may need to first take ownership of the file or folder. See this article for more information on how to do that: https://support.microsoft.com/en-us/kb/326549
-There may be a problem with the Attribute Changer program itself. Try reinstalling Attribute Changer and see if that fixes the problem.