The installation file ma90_setup.exe will install the program locally, which means the program and all associated files will be copied in the directory C:/programs/MatheAss 9.0 .
It will add a link to the start menu and create an icon on the desktop. The file DEMO.DAT and the users data are stored for each user in its own folder AppData/Local/MatheAss 9.0 and can be changed. The registration data however are stored in the program directory, and can only be changed as administrator.
To install MatheAss portable, e.g. on a USB flash drive, just copy the whole directory C:/programs/Matheass 9.0 on the stick and set in the file ma90.ini the option portable=true . Now all data are stored in the same directory, for which you need write permission.
To uninstall a local installation of the program, right-click on the MatheAss 9.0 program in the Start menu and select Uninstall or open the file unins000.exe in c:/programs/MatheAss 9.0 . All directories and links created during installation will be removed.