As of release 3.2.200 (560), the client remembers the base tray last selected in the Cast Adjust 3D module, including the associated parameters.
After the update, the Scaling parameter for the EU and US standard base trays is initially set to 80% (previously always 100% regardless of the last installation used). This value 80% should be adjusted to the desired scaling, which will then be used as default at the next module startup.\