java.lang.NumberFormatException: For input string: "1,225"
Is that a comma? What language is the default on your machine?
OK, the problem there is that it's trying to read the xml config files for your existing girls, and finding something it doesn't like (the comma, I suspect).
I've got a whole bunch of questions, which will hopefully help me work out what's going on in there.
Those files are in [your Sex Sim dir]\Runtime\user_created\characters and [your Sex Sim dir]\Runtime\_aData\characters. If you could have a look, and work out which file/files have commas. If you see a pattern (like, if it's only files that you've edited, or only files that were created by PPP) let me know.
Is it just the boobsize values that have commas, or do other numbers have them too?
Is this the first time you've used PPP, or have you successfully run it once (or more) before it blew up?