Won’t unrar lti file archives

I have this really annoying bug where when I double click the .rar file that comes split into multiple files it almost ALWAYS opens the preferences pane instead of opening and extracting the archive file. This is majorly frustrating as it basically makes this app useless. I’m on newest version of Yosemite. I would pay for a premium version of this app with the ability to add a list of mult-file archives and click one button to extract all of them. Similar to ExtractNow for Windows.

rastafar-i about The Unarchiver, v3.9.1