Thank you, David. I received both files.
If you do the upgrade from the BridgeScore Upgrade menu, then BridgeScore will shut down before the upgrade starts.
If you upgrade from the website, then you have to shut down BridgeScore manually.
I checked both files and they both seem OK. The files are from the folder c:\temp and BridgescoreInstall407.exe would have been used by BridgeScore when it crashed with the above message. I tried running it on our testing laptop and it worked as normal. I don't know if these files are from the PC that had the original problem.
It would be good if you could send the files from the other scorers laptops, when they get the BridgeScore upgrade error. This would mean that they try to upgrade even though they are already on the latest version.