I have tried generating a diagnostic report again, this time typing the path within quotation marks as per your instructions. This yielded a different error, namely, "Windows cannot find 'C:\ Files\RStudio\bin\Run Diagnostics.lnk'. Make sure you typed the name correctly, and then try again."
It appears there is no Run Diagnostics.lnk within my \bin directory (checking via windows explorer confirmed this). There is however, an application called "diagnostics"; running this causes the shell to quickly open and close, and I cannot discern if it is producing any output files at all. Any further ideas for getting that diagnostics report?