That blue button thing doesn't work for me, and the instructions that you linked to are not for the Time Warner DVR, in any event (they are for the regular, non-DVR digital cable box). On my DVR, the blue button opens a list that lets you change the date that you are browsing, in all three of the browse modes. Pressing it again does nothing.
That does highlight another absurdity of the browse-by-title functionality (and its related search feature, for those that have it)--the DVR only lets you browse titles for a single day at a time. So by default, that title list only includes programs that are airing today, and you can set it to instead view titles that are airing tomorrow, or next Tuesday or whatever, but you can never list more than one day's worth of titles at a time. Which makes the whole feature utterly useless, because I don't really need a search function--or even an advanced browse function, above and beyond the basic channel browser--to find programs that are going to air today. And I likewise do not need one that lets me search for stuff in the future, but only if I already know specifically what day the show will be airing. Tivo never requires that you know when a show is going to be on to schedule a recording. Hell, it doesn't even need the show to be listed. I can tell it to record, say, all episodes Max Headroom, even though the show hasn't been on television in over twenty years, and if it ever does come back, the Tivo will record it.
Or I could, if I had one. Anyway, comparing the Tivo to the TW DVR is like comparing a sophisticated fly-by-wire modern jetfighter to a rock.