worst case scenario is you Binarised the original and now you cant open it anymore, Best case is your opening the wrong one and need to re-open your original non-binarised p3d.
Only way you can look at that binarised one now is to make a new file > creat > proxy >link to the binarised p3d , then click View Show proxies and your model will be shoen , you cant edit it anymore though
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