This has been driving me nuts.!! I go to update RM and the download starts and goes to like 46% and then the download progress window disappears and I have to initiate the download again only to get to like 92%. And again to get to 117%. And again to get to 208%. And again and again and again. I can find no solution online.
It took me until I got to 517% for the update to finally extract and initiate the executable. This has been the norm for me all year.