Hi,
I have installed the Plant Design Suite Ultimate 2015.
I have to check an older plant project made with the 2014 version that I MUSN'T UPDATE TO 2015.
To make this I tried to simply install the 2014 version but when I try to install it says to me that it cannot go further because a newer version in already installed. The opposite is possible (install a newer version when an older ones is already present) because I always wait some time before uninstall the older version (so I can make some test).
I hope that there is a ways different from uninstalling everything and start installing from the older to newer versions.
