I hope this one works because SR4 was a disaster.  I had to roll back to SR3 to use Poser Pro 2014.  I'm hesitant to install SR5 until I hear it works or have a new backup before installing it.

Poser 2, 3, 4, 5, 6, 7, 8, 9, 10, Pro 2014, 11, 11 Pro