I would like to reorder the arrangement of my apps on the home screen. I'd like to stack the apps I use the most on the left, top to bottom.
Is there a way to do this, either on my TV or my computer?
You have to arrange them on the TV that the device is connected to. (arranged on/per device).
Highlight the channel/app, press the * button on your Roku Remote, and select "Move Channel". Then use the arrow buttons to place the channel/app in its preferred location.
For the most part, any newly added/installed channel will be placed at the end of the list.