I am looking at an old job circa 2007 on Microdrainage and whenever I open the file on Simulation, it asks me to update the APT (design criteria), by doing so it over rides the previous simulation. unfortunately, a PDF of the simulation is not available. I wanted to open the file to review previous inputs such as impermeable areas, size of attenuation system, simulation criteria etc..

Any help is much appreciated

Many thanks
Alpha Barry