If you have a previous version of SystemSuite or Fix-It installed you will need to remove it before you can install the newest version. Please remove your current version through Add/Remove Programs. Once you have done this, please go to the install directory located at:
C:\Program Files\Ontrack\
or
C:\Program Files\VCOM\.
Delete the entire SystemSuite or Fix-It folder if it still exists. Once you have done this, install the latest version.