Thank you for the kind words. We do our best to improve Remote Utilities. Unfortunately, more advanced features may not look straightforward at first and do require some digging into documentation which we strive to update as quickly as possible with each program release.
PS: After uninstalling Remote Utilities, the Folder inside the AppData will NOT get deleted! Really dangerous, also the Registry Key will not get deleted had to do that all manually.
First, let me assure you that there is nothing dangerous in it. Almost every Windows program leaves their traces in user directory and in the registry. These files help you pick up your settings and data files where you left them when you uninstalled the program should you decide to install/use it again. Remote Utilities Viewer configuration and data files as well as Host's registry key are harmless - they are not executable files and they cannot work on their own. They only contain configuration information.
Regarding the issue at hand, as our technical support specialist suggested earlier we recommend that you completely re-install the program and try using it "out-of-the-box" without enabling or modifying different options (just leave them default for now). They you can explore and enable various features - e.g. RU server roles - one by one and if you encounter an issue let us know and we will do our best to help you.