The problem is due you have different drivers for Arduino installed in your computer. The only software you need to install is the LabVIEW Hobbyist Toolkit
So you have to follow the next steps:
1. Uninstall all the different drivers related to Arduino: LabVIEW Hacker, LabVIEW Interface for Arduino, LINX by Digilent/LabVIEW MakerHub and any other you have installed.
2. Reinstall JKI VI Package Manager. You can download it from here
3. Install LINX by Digilent/LabVIEW MakerHub. You can do it following this article
4. Once LINX by Digilent is installed in your computer, now you have to install firmware into Arduino. Follow this article: Communicating LabVIEW with Arduino