Please see this image:
It’s my friend’s desktop. Originally this machines installed 5.4.1.2, and I told him to install still version therefore he downloaded 5.3.6.1 to install. After removing 5.4.1.2 he tried to install 5.3.6.1, but got this message (in Chinese, I translated it): “A new version 5.3.6.1 found. If you want to install older version you need to remove the new version first.”
Anyone had the same experiences? It looks like that 5.4.1.2 wasn’t removed cleanly. However the “new version” number is wrong either.
(edit: activated screenshot)