To upgrade your version of the SatSCADA GUI uninstall the version you have then install the version you want to upgrade to. Even though it is recommended you uninstall first this procedure will work if you install over a previous setup.
Only one version of the EXI installer version can be kept on your system at one time.
Any number of ZIP portable versions can be kept on your system as long as they are unzipped to folders with distinct names. The portable version can also be installed even when the EXE installer version is present.