Keyshot 8 / Out of memory (requesting 4294967214MB) This may cause instabilities

[Chris_80]

Hello,

I am getting this error message now on my second Project File.
The File Size is 807 MB. Also my old File which the latest was build on doesn't work anymore.
The Old File was last saved in June 2019. The Latest File was last saved on January 29th,2020.
This looks more like a Windows 10 problem to me. 
Is there any way to solve this issue, or is my Data lost?

Thank you very much,
Christian