I've used Molly's suggestion in the past, too. You can use your Poser 7 content in Poser 13. Where you had trouble with Poser 11, you might try the free trial before paying for 13. 

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Available on Amazon for the Kindle E-Reader Monster of the North and The Shimmering Mage

Today I break my own personal record for the number of days for being alive.
Check out my store here or my free stuff here
I use Poser 13 and win 10