I'm not really sure why people are continually apply their own adult, fully logical, completely rational thought processes to Nora and what they would have done - especially thinking about the door vs window.
Yes I don't think the window was at all difficult. The ledge looked like it was, maybe 4" off the ground? Plus, in an unfamiliar location, a child/toddler or someone of Nora's ability is much more likely to think "Large opening I can see outside light and jungle through" EQUALS "Door or Exit" rather than fumble, walk around try to find an OPAQUE door in a place she had never been. It's very easy to understand that if she came down that spiral staircase, saw light/heard noise, that was the way she went to outside. Also, it's possible she had experienced sliding doors before and that window looked just like one, so she knew it was a way out. It wasn't a high up window. It was large and looked exactly like a possible exit.
Regarding the clothes, I find nothing nefarious in her being naked. The media have reported it as a salacious detail, but in reality, her flimsy underclothes would have been easily caught on branches, leaves, brambles and/or if they got wet, she could have just taken them off. My 5 year old nephew HATES the way wet clothes feel. He'd rather be nakey.
I just really really hope her parents will get over any misplaced guilt they might be feeling. Even if they underestimated her abilities, that's perfectly normal. And if they had absolutely no data points in which Nora did something like this, there is no way on earth they could have known she would have wandered. My heart breaks for them at the loss of precious Nora and all the "What Ifs" they must be grappling with. So sad.
. Life can change in an instance 