I think you’ve got your plugins mixed up with the widget logic. This is the correct plugin: http://wordpress.org/extend/plugins/widget-logic/
I’ve honestly never heard of the other one, but it looks like sort of copy of the original made at some point for less tech-savvy users, I suppose. But either way, you want to stick with the original Widget Logic plugin. It hasn’t been abandoned.
And this theme will be updated in the future (I’m probably going to change the name, too). I’m currently going through and trying to get everything up-to-date. This theme is my 2nd best selling theme, so I wouldn’t just abandon it. 😉