Can you post the stacktrace about the Camila issue?
As for the gender selection, it's been removed from the demo. The female MC story will have it's own DLC.
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Ok this is strange I redownloaded the demo here and it worked fine. Even thought I downloaded it multiple times last time and it never worked, so I guess it was not downloading properly for some reason yesterday.
It's a shame that the Fem MC option was removed, hopefully the description gets update to account for that so people don't miss it.