Try going into SteamVR > Settings > Developer > and make sure "Enable VR Dashboard" is checked on. Otherwise I'll need you to provide a little more information on the behavior itself and what happens when you hit the system button.
-Which details panel are you talking about? Within SteamVR or the Steam desktop client? Can you provide screenshots?
Instead of opting into the beta, I would recommend anybody having issues with the more recent SteamVR updates to switch to the temporary rollback branch currently being hosted.
p.s. I wouldn't recommend ever uninstalling and application repeatedly when it's not working - that's hell on your Windows registry and can cause some pretty gnarly issues.