Replace the full set

A quick learner from Windermere FL says:
How do I remove the rail from back bracket. if I cant, can I remove the back bracket completely and get a full set to replace?
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Bob from SWISCO responded:

With these old brackets, I've used a flat, thin putty knife and a hammer to pop them off. For a replacement track, see our 32-056 and the other-sized variants I've listed on this page. We don't carry tracks that end with that 'L-shape' your tracks have; instead, you'd need to use our 32-018 Drawer Sockets instead. These are mounted with screws. 

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