I wonder if it’s possible to run their remapping program in a Windows virtual machine.
That should work if you can pass through the entire USB host device to the VM.
I do this with my QK80, which also has Windows only software. I have a KVM virtual machine with Windows, and when I want to configure the QK80, I use the “pass through USB host device” option to give it direct access to the keyboard, and run the software in the VM. It works fine.
If you do this, you temporarily need to connect a second keyboard though because as soon as you pass through the keyboard to the VM it becomes inaccessible for the host OS.