After download unzip the .zip file, while leaving the map structure in tact, and subsequently run the resulting setup.exe file.
Important note:
For Calculux 7.4.0.0 you need the latest Philips Productselector.
(PPS5200_ema_20100128 or later)
Older versions of Calculux will not run with this Productselector.
So please update both.
