I am having the same issue. I had an old viewer but matched host. I tried updating the viewer but still have an issue where it shows online, then upon connecting the host goes offline. Can you help with this?
I solved this...so we can considered this topic closed. Well not me, but you can now use Remote Utilities on Chromebooks thanks to Google. You can now install most Android apps on Chromebooks with the current version. I am currently using Remote Utilities and it works well. Thanks Remote Utilities techs, but looks like Google solved this problem for you!