(Linux/Wine) Auto-updater fails "Version string portion was too short or too long"

I'm on Linux 5.15.32_1 with Wine 7.5 (development build).

It's been a year or two since I tried the launcher. The same error appears regardless of whether I start with my old launcher install or a fresh install (from the latest installer on the w3dhub website w3dhub_launcher_0.13.0.2_install.exe).

What "version string" is it after? May I please request access to the source?