Unhandled Exception Error

Are you having a problem with all point clouds? Is your point cloud a FARO? If so, look at website:

communities.bentley.com/.../16755.installing-the-faro-sdk-to-update-bentley-pointools-v8i-and-make-it-compatible-with-the-latest-version-of-faro-scene

You can download Bentley PodCreator from the Bentley Software Download Fulfillment site and try converting your Point Cloud. Bentley PODCreator is a free download that will allow you to convert Pont Cloud files to POD files that can be attached in Bentley Descartes > Point Cloud

Point Cloud is fine on everyone else's machine in my team. Ive uninstalled Descartes and Reinstalled, no change. I'm on Windows 10, could that be why?

In MicroStation > File > Point Clouds are you able to attach your Point Cloud files? If not, then uninstall Descartes and then uninstall MicroStation. Delete the files and folders where MicroStation and Descartes were installed. (Program Files x86\Bentley and Program Data\Bentley.) Reinstall MicroStation and Descartes. Make sure you are installing compatible versions of MicroStation and Descartes. For example if you are installing Bentley Descartes for MicroStation 08.11.09.720 then you will need to install MicroStation 08.11.09.829. If you are installing Bentley Descartes for MicroStation 08.11.09.601 then you will need to install MicroStation 08.11.09.608.

i can attach POD Files ok, i struggled then to do anything with them.

whats the significance of the Version numbers? how do i know if one is compatible with the other? My current Microstation Version is 08.11.09.748 and Descartes is 08.11.09.432

The compatible version of MicroStation for Descartes 08.11.09.432 is MicroStation 08.11.09.459. If you are running MicroStation 08.11.09.748 then you will need to run Descartes 08.11.09.601. The latest release of MicroStation and Descartes is MicroStation 08.11.09.829 and Descartes for MicroStation 08.11.09.720. MicroStation 08.11.09.832 is also compatible with Descartes for MicroStation 08.11.09.720.