I'm traying to update the screenshots that the channel show before install it.
I upload the files to the website of roku. but the channel is not updated even in days. How can i update these screenshots ?
This sounds like this is your own Roku channel and you are the developer. If so, you should get more help in the Developer forums, just down the hall. https://community.roku.com/t5/Developers/ct-p/channel-developers