I was finally able to get UFile 2020 to load... but without assistance from anyone at UFile.
I disabled every "anti-virus" programme that I could find on my computer, including Vipre and Windows Defender.
Part way through the installation, the installation programme wanted to abort due to two other programmes that "require updating" (one had something to do with NVidia), but I forced the UFile installer to complete its installation now, with a reboot later.
Zero support from UFile! Duly noted.