I'd look at it. BLC is almost clear, but a slight tint to it. Its an acid based cleaner, so really it shouldn't go bad until its noticably bad (dark color, crusties on the inside of the cap, etc)
if you're still freaked out, go ahead with the pbw instead, and if you have star-san I'd run that through after since its an acid sanitizer and will make sure the lines are 'fresh'.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10