MatDeck’s trial version is fully featured, but is limited to 14 days of use. After 14 days it turns to “express/reader” mode which will allow you to open and view MatDeck files, and perform basic mathematical operations.
Our Comparison page will take you through all the differences between MatDeck editions.
Windows 7 Patch
Before installing MatDeck, Windows 7 users need to install the Microsoft patch for it.
https://www.microsoft.com/en-us/download/details.aspx?id=40784