Made possible thanks to Pulseh
Continued by Mr. late
The SteamVR button is hidden while a solution is found. Check out issue #43 for discussion
The skin requires a set of fonts installed on your system, of the SegoeWP family. You can download them here.
It should have the following sha256sum:
b07d48afc0c36636de66bd72de62faa02ed79c438e7172ecc7bb89efd1d5319b SegoeWP.zip