I was able to download ok. However when I went to install. A message came up that said I had NO PERMISSION because the download was not from an Apple App. I was not able to install.
Try installing QTR again. When the error message pops up, click OK. (The error box will disappear.)
Now open System Preference / Security-and-Privacy / General (tab). Near the bottom you will see a message about QTR being blocked. Just click the “Open Anyway” button, and you will be allowed to install QTR.
Myron