Thanks for your very detailed response.
Unfortunately, none of the controls shown in the examples found on the Manage Results link above are enabled on my machine. I've tried a number of things to see what can be done to enable these controls, but have been unsuccessful.
At one point, in Summer 2016, I did create a Test List and scheduled it to run during my off hours, but eventually turned that off. There still remain some Results showing in the results tab. I thought by clicking one of these data sets would enable the disabled controls, but that didn't work. I eventually deleted the Test List, so in some ways, the results cannot be tied to a specific test list and are "orphaned" to an extent. I could click the Delete All button on the Results tab, but am worried that might result in other unintended behaviors.
Additionally, you suggest that if I can't get my tests to run remotely, I should submit a log file. I am running all my tests locally, there is no remote execution involved with any of my tests. I'm assuming that my scenario (creating/running tests on a local machine) is supported, but wonder if my TestStudio installation is not configured properly. Given that the issue is something that I'm only recently starting to experience makes me question that assertion.
If there's anything I can do for my installation that would enable the controls mentioned in your solution, I'm willing to do it, but just don't know what to do from here.
Thanks for your help,