Just yesterday, my Mathcad Prime 3.1 (free version) started acting up. When I double click the icon or run from the start menu (Windows 8.1 shell mode) I see the "splash" logo for Prime but then it disappears and a main window never shows up. Also, nothing shows up in the taskbar.
If I go to the Task Manager, I see the program, even multipe copies if I keep double clicking the icon but no window and no icon in the taskbar.
Has anyone seen this before?