Sorry, we fixed this problem on 2.0 although the issue situation is abnormal itself. Please check your private message, I will invite you two to 2.0 beta test, to see whether it can work well.
Hello Oliver,
thaks you for your help. Sorry for the silence, but I have to focus on my work and finish my commission for the clients. In a month I will start few more commissions and will be very pleased to make my D5 Render work safe 
For now, I have made a new file, with new assets and as I said, It crushed on very few of them, but about problem with crushed file it havent happen again - but we still dont know why my file saved broden?
I’m using Total AV Antivirus PRO 2020.
Tommorow I’m leaving for some holiday, but when I’m back I will reinstall my D5 Render with beta version deleting all assets and I will let you know how it works.
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ok, thank you! Enjoy yourself and stay safe!