Well Peter, the downloads are on my google drive and I just re-tested the links and downloads (RTMM Master, RTMM Add-ons for P3Dv4, RTMM Add-on for P3Dv5 as well as the Tongass download file). All links and file downloads are working as intended so not sure what you experienced issue unless google servers were a tad too busy?
The files are fairly large but not sure what was preventing your downloads. Might want to check your virus scanner or browser just to make sure the files weren't being blocked for some reason. In any event, on this side of the world the downloads and google drive site are working without issue.
Give it another shot today to test but no worries, in the mean time have just uploaded the
RTMM Add-on for P3Dv4.zip file to a different shared drive (one-drive) for you.
LINK:
https://1drv.ms/u/s!Ap8x9gXrO-rJg6Ea7y3G71wxIEyAEQ?e=Zp6SFYHopefully this will download will work for you Peter.
Please let me know when you have downloaded the file so I can remove it from that (one-drive).
(file is almost 2.7 gb).
Norm