DAZ exes don't work any more but you can re-download them in a zip from same site; that's what I did with a few. Old runtimes work fine with connecting to P13 (I have a few from back Poser 7 and up). Gen 3 and 4 DAZ figures and their content work just fine, matierals need adjusting heavily. Luckily there are some scripts around that make that easier.

P13 comes with wonderful new content supplied that will get you started, actually.