Found the solution! Download an older version of axon on archive.org,
such as this one: https://web.archive.org/web/20080720223619/http://www.nch.com.au/pbx/pbxsetup.exe
Newest working version: https://web.archive.org/web/20140122134953/http://www.nch.com.au/pbx/pbxsetup.exe
It should work just fine!
Good luck!