mp10 to ms10 conversion describes the export of projects from version 10 of NI Multisim to the default design format used in that particular version of the software. While it is sometimes possible to open older designs/projects in modern version, this might not always be the case, especially for ancient files. The current version of the tool is 14.3, and it can only save to the latest version of the drawings, which means you will need to get access to version 10 if you want to save .ms10 files.
Updated: August 23, 2023