Read Instructions Carefully
This solve the problematic Ralink Wireless Utility that simply does not work on yosemite and the package doesn´t install the maverick kext in yosemite.
Copy preference pane to SystemLibraryPreferencePanes
Copy kext for your MacOS version (use Maverick for Yosemite) to folder SystemLibraryExtensions
Rebuild kext cache
Thanks to rodrigocunha