Hi Andrew
Sorry to hear you are experiencing crashing issues.
Does this crashing occur with all characters and motions or just the ones shown in the video?
If it happens with all characters and motions, then uninstalling and a clean reinstall would definitely be worth doing.
You should also run Windows Update and ensure you have your system full updated. After doing this check you have the latest graphic drivers installed using the link below as this is important.
https://www.nvidia.com/Download/index.aspx
Peter
Forum Administrator
www.reallusion.com