how to interface PCA9546 with arduino uno? what to do with reset pin?

i need to interface arduino with 4 no of PCA9546 and i would like to select each of them separately. i got the library from link :

when i add this library it is not successfully compiling.

selecting individual pca9546 possible with driving reset pin by I/O s of micro controller.

Can any one tell me the library file available link, examples in that