Worked on my hole today ...was quite happy with the achivements ... so I was planning to make a new save to play it in PG .... Decided I should JUST go in and delete the FlyBy that didnt work first...thought I had selected it , and pressed delete .... noticed I couldnt go back on the TAB button ... nothing responded ,,,, so I closed the program Unity.... and when open Unity again I had only the hole , No Terrain.... Any chance I can recover this ? .....