Sorry to bump an old thread, but my questions seems most appropriately put here.
The latest version of Perfect Viewer, 18.104.22.168, has an inbuilt hardware button management system. Unfortunately, I can't seem to get the buttons working. My gpio-key.kl file says DPad_Left and DPad_Right and 125 and 126 respectively, but these numbers don't work when entered into the Hardware Button settings. Other threads suggest 105, 106 as the key ID's but these don't work either.
Has anyone managed to get it working?