Call me crazy if you like, but I'd never use a webapp that has that feature. It just opens you up to more potential security problems. For example, it appears to operate over in-the-clear HTTP. Poisoning someone's DNS cache and then somehow triggering an "upgrade" = changing their software to whatever I want.

Also, "Note that your files all need to be owned by the user under which your Apache server executes, or you will receive a dialog box asking for "connection information," and you will find that no matter what you enter, it won't work." That's a security no-no if I've ever seen one.