After various workarounds, I did manage to get the Ufile2020.exe download on to my pathetic Windows 10 tablet that I have, and through that I was able (with limitations, see below) to install Ufile2020 to my Windows 10 Desktop. Not sure exactly why it downloaded onto the tablet this time, as it had not done so in prior attempts.
How did I then download to my Desktop??... I went back to my tablet and Dropboxed the now opened Ufile 2020 file folder to my Desktop, opened the Ufile2020.exe from within the folder and ran it. Ufile2020.exe did install onto my Desktop, and appears to be functional in "most" respects. To test it, I downloaded my 2019 Tax file info into Ufile2020, and filled in some data, which it accepted. I also tried to update the Ufile2020 program, but the Ufile2020 updater will not recognise the Ufile2020 file on my system, so it will not update (not that there was an update anyway). Not being a computer whiz, I relocated the Ufile2020 program to my Program Files (x86) where it shows up if I go into Program Files (x86) , but there is still no recognition in my system (e.g. nothing showing in Settings under Apps or Uninstall), although my older Ufile2019 does show). So I can run Ufile2020 on the Desktop, it is not recognized as installed in my Windows programming, and I surmise I may have further problems down the line if it is not recognized. Next step, dump everything, try reinstalling from opened Ufile2020 folder again.
Presently responding to 3 generic, "try these unrelated links", non-answer Ufile Support responses, all for the same subject, as I've sent 3 similar enquires over a month as they do not acknowledge or respond in a real world time frame (okay, my version of real world).