Matrix 7 had a final SR (Service Release) number 7.5. If your installer is older, ask Stuller for the 7.5 update patch. This fixes the "dynamic section preview crash."
Before downloading Gemvision Matrix 7, ensure that your computer meets the minimum system requirements: Gemvision Matrix 7 Download
If you are moving projects from Matrix 7 to a newer installation, you can typically find your active files in the Matrix 7/Projects folder. Matrix 7 had a final SR (Service Release) number 7