Unpack the ZIP files and run festo_offline_12.7.3.232651.msi to install.
The *.cab files must be in the same folder as the *.msi for installation.

***Festo_offline_12.7.3.232651.zip***
Installation program does not contain CAD models.
Latest CAD data is downloaded automatically when Festo PARTdataManager is first started.
You will be notified of CAD data updates on each start and can install them with a single click.
Only the changed data is downloaded, making the update quick.

***Festo_offline_12.7.3.232651_CADdata.zip***
Installation program with an initial database e.g. for CAD workstations without internet connection.