Perhaps I should have explained my advice. Remote Utilities is software of dual nature. With each update, even a minor and sub-minor update there are little features and fixes added to Host and Viewer.
Therefore it doesn't make sense to troubleshoot a problem before Viewer version matches the Host version. Even more so - both should be the current version.
Otherwise, i.e. if we try to diagnose a problem when there is a version mismatch and/or it's an old version, we cannot tell if this is a yet unknown problem, or just an old bug already fixed in the current version.