The issue is likely due to the fact that the Enabler Configuration Utility is itself a Windows Executable (exe). The Java utility is only the initial pop up wizard that leads you to the Enabler Configuration exe. I'm not really a Linux expert by any means but maybe you could use Wine or another Windows Compatibility layer to run the EXE within your environment.
Even if you do get the utility to run, I'm not sure if it will successfully update the Avalanche package after you make the configuration changes within the utility. That still could be an issue that may drive you toward using a full blown Windows environment. But watch out for updated version of Chrome and IE11 since they won't work either thanks to NPAPI deprecation! It's kind of funny how Wavelink moved toward a web console in order to be operating system and browser agnostic but with the heavy reliance on EXE configuration utilities and Java plugins we're now stuck using Firefox in Windows environments in order to properly use it.