Not sure what to say.
But I would say Zennoposter has weak customer support.
I just bought zennoposter after reading this thread and reading countless other threads with the name 'zennoposter' in it.
Let me tell you. I came in here hoping to tell others just how powerful zennoposter is but instead, how am I supposed to use this beast if I cant even install it? I mean, the program does not want to install.
I even contacted customer support and still no help from the zenno team.
It installs fine for me. Even when I did the upgrade everything went great.