I searched all across the internet and this forum and couldn’t find an answer anywhere. There is no way to clear the cache from the macOS companion app. On iOS you have a specific option (companion settings) which doesn’t exist on macOS. The macOS app also uses its own rendering I believe (clearing caches from Safari or other browsers don’t work, I tried).
So: how on earth are we supposed to clear the frontend caches WITHOUT resorting to deleting the entire app with App Cleaner? I also looked in ~/Library/Caches on macOS folder, but there are no HA companion app folders anywhere. I need to clear the cache, so it can properly load the correct custom component after a downgrade.