BT54-
Most likely you've received an upgrade to your Roku software, and you just need to restart your Roku.
Depending on your Roku model and Roku version number you'll find the "System restart" option under "Settings > System > Power" or if you don't have a "Power" option, under "Settings > System".
If a restart doesn't do it, or if you don't have sufficient control with the remote to navigate the Roku menus, you can also restart by pulling the power plug to the Roku for a few seconds then plugging it back in and waiting for it to restart.
