MPh is available on PyPI and can be readily installed via
pip install MPh
pip uninstall MPh in order to remove the package from your system.
Comsol, obviously, you need to license and install yourself. Versions from Comsol 5.1 onward are expected to work. A separate Java run-time environment is not required as Comsol ships with one already built in.
On Linux and macOS, Comsol is expected to be found in its respective default location. On Windows, any custom install location is supported, as the installer stores that information in the central registry.