Linux connectivity kit support?

[Preface2]

The firmware that shipped on my calculator is from 2018, and it looks like the latest available version is from May of this year. I searched for Linux support and only found old threads, the most useful of which was https://www.hpmuseum.org/forum/thread-12257.html. It looks like an old technical preview was built for Linux, but otherwise Linux support only comes in the form of libhpcalcs, which is from 2013, and it wasn't clear from gfbci's report at the end of that linked thread whether or not upgrading firmware was working.

I tried running the Windows version of the Connectivity Kit in Wine, but the installer hangs. Setting up a VM just to push a file over USB is a last resort. Is there any way to upgrade the firmware from Linux?