Found this on Cathe website, not sure how old these instructions are, maybe someone else that uses it
that way will chime in...
How to Install and Use the Cathe Live App on Your Roku
Cathe Live Roku viewers, we have recently had to update the Cathe Live app to meet Roku’s new requirements. You will have to uninstall your old app and install the newest version. Unfortunately there is no way to update the old version. Please follow these steps to get the new version installed on your Roku device:
Delete the old app on your Roku device:
Select the old Cathe Live app with your remote, but don’t launch it. It should only have the selection rectangle around it
Press the * key on your remote, then scroll down and select “Remove channel”
Confirm the removal, then continue below
If you choose to install the channel on your Roku device (recommended method):
From Roku’s main screen on your TV, scroll down and select “Streaming Channels”
Scroll down and select “Search Channels” in the menu to the right
Type in “Cathe Live” with your remote, and you should see the channel appear on the right side of the screen
Select the channel by hitting the right arrow, then select “Add channel”
That’s it. The new app should be on your home screen. You will need to log in again using your Cathe Live account credentials
If you prefer to install the channel from your computer’s web browser: