Hi,
We also packaged Spectrum Analyzer tool as a stand alone application for Windows and MacOS. It is available for download on our support site:
https://support.cambiumnetworks.com/files/epmp_tools_and_docs/
It is the same Spectrum Analyzer tool, but made as a native executable instead of Java Web Start so you don't have to mess with Java settings in your browser any more.
Thanks,
Dmitry