"Could be interesting." She may be implying something to get a rise out of him or she might be implying something because she's curious. The GUI has been altered significantly to interface more like a simple organization of an alphabetized drop down list. It's simple to use but a bit more complex in aesthetics.
"That, doesn't sound ominous at all." She's going to keep looking at the code because she doesn't want Ray to see how worried that statement actually makes her. It could be anyone and the way he says it makes it sound less then good.