Recently there was a new release of Mathcad Prime 5.0. And here only a few new features concerning 2D plots:
PDF's "Read This First", "What's New", "Migration Guide", "Licensing Instructions", "Keyboard Shortcuts", "Installation and Administration Guide", "Hardware Notes" guide for this release can be found in attachment.
OS Windows support:
Mathcad Prime 5.0 Express version can be found by using the following link: https://www.ptc.com/en/products/mathcad-express-free-download