While I haven't used this enough to make any thoughtful comments, I do want to grind an axe here.
Attn MacUpdate Management: I do not know, nor do I care, why you persist in wrapping some applications in your own installer DMG when we click the download button above. First, for us users it is an extra step and it installs the app in our Applications folder without our permission. There is a reason Apple created the Downloads folder and where anything selected to be downloaded is filed in the Downloads folder. Like many users, I prefer to try out apps from within the Downloads folder while considering their worthiness. If I like an app, I will move it to the Applications folder. In the meantime, please stop trying to determine for us where items are to be placed while in transit, so to speak.
If I find a MacUpdate wrapper, I delete the DMG and go directly to the developer's site, download their software, and keep it safely in my Downloads folder for disposition.
Please don't try to anticipate our way of doing things.