That reply was about you not having had problem before with the 8.3.3 installer.
Avast has no problem with the downloading or when manually scanning previously 8.3.3 and now the current version available on github. However, when I attempted to install it, it complained of potentially suspicious behaviour and (until manually overridden) blocked it and uploaded it to Avast for checking. (It has later on come back with a message saying it's clean but the point is there's something it still doesn't completely like it.)
The trial installer message is because they've recomplied the program using a different installer program/version than before to stop the anti virus block, persumingly a trial version just to get it working in the mean time.
Ooops. Didn't see your post. Sorry.