VG - don't 'struggle'!
The software is not definitively 'relevant' to this crash. The questionable suitability of an apparently 'unairworthy' aircraft is.
The truth is no-one knows for sure what happened (probably the root message in this whole series of threads) - it is all guesswork, claimed as 'deduction'. It would be of benefit to you to absorb all the messages here if you have time.
For others - I gather a MkI was 'not available' on request. Two questions please:
1) What handicap would a MkI have introduced for the detail?
2) I begin to wonder if there is a possibility that someone was just trying to 'show off' the 'new' MkII by sticking all those important and most unfortunate folk on it?