print to pdf issues - using PDFwriter

hello: I am trying to change a pdf page size from B3 to B5 by printing through a pdf print driver. Currently I am using PDFwriter. Issue is this - I can print using PDFwriter just fine and it moves through the print queue no problems, however, once it passes through the queue I can't find where the pdf file is saved on my mac. Does anyone have any possible idea where this file would be saved? I've checked everywhere I can think of......

Thanks!!