The WK installer requires Windows 7+ anyway, so it's fine for the updater as well.
If you have issues with the installer crashing, make sure your HD installation is updated to 5.8 (and run steam as admin before running the installer). Someone on reddit reported that fixes the issue.
The updater files are hosted on onedrive to make sharing edit permissions simpler, but perhaps github is better if that causes issues.
Spectating games being stuck on one match is related to the voobly-spec.mgz being locked in some way. Either deleting that or restarting should probably fix it.
If you have issues with the installer crashing, make sure your HD installation is updated to 5.8 (and run steam as admin before running the installer). Someone on reddit reported that fixes the issue.
The updater files are hosted on onedrive to make sharing edit permissions simpler, but perhaps github is better if that causes issues.
Spectating games being stuck on one match is related to the voobly-spec.mgz being locked in some way. Either deleting that or restarting should probably fix it.