@salma31 this is a very old thread. The "3.0 upgrade" referred to dates back to 2009.
Apple still does not support discounted upgrades to new app versions for existing customers. As a result, Faber Acoustical now offers a choice between the subscription-based SignalScope X and traditional perpetual license versions (for which we still cannot offer a proper discounted upgrade path).
As for generating and analyzing pink noise, the most affordable option is SignalScope X with a Basic Tool Set subscription, or SignalScope Basic 2022. If you want to monitor the pink noise with a fractional-octave-band analyzer, then the Advanced Tool Set is required.