I redownloaded the file from this site and the file size was different. This newer version (below list as -2) installs without incident.
I'm not sure what happened there. Did you upload 2 different versions? They both appear to be correctly digitally signed
When installing 19.49 onto a win 10 machine, I get Windows defender halting the install at the file "GameEx_background.dll".
When installing 19.48, the installer pauses on that file for a second or two then continues installing without incident