Don't know the exact reason, but they announced the reimaging in late April.
http://www.cnyradio.com/2011/04/29/wutq-swaps-hank-brown-for-wktv-simulcast/
Interestingly, the "old" B95.5 logo is still very prominently displayed on the
station website, but a newer "95.5FM WUTQ" logo, minus the B, with different colors and fonts, appears as part of a smaller image a little ways down the page, on the left.
I think the "B" part of the name stood for "Beautiful Music," which is what the station still airs during the non-talk hours, but since there's been more emphasis on the talk and news offerings (especially since they picked up WIBX's discarded CBS News affiliation), dropping the "B" makes sense.
I would be surprised if WYJB ever had a problem, as Roser's 95.5FM is just a translator. Regarding the two AM stations (WUTQ and WADR), radio-locator.com shows very little overlap between WYJB and Roser's two AM stations (WUTQ and WADR). It's "distant" or "fringe" strength from all three stations... mostly over Fulton County, which is a gray "no mans land" as far as Arbitron is concerned. Besides, WADR is daytime-only and the aforementioned overlap involving WUTQ(AM) is also daytime-only, as the station's night pattern is considerably smaller. Besides, if WYJB had issued some kind of "cease and desist" order, the B would already have been removed from the logo on b955fm.com. (And the domain name likely would have changed as well.)