Hi.
when you have configured SimDash for one car, use the menu "File->Export Settings"
SimDash will ask you where to save the file. save it on the Desktop and call it Car1, for example.
Then configure the second car and create the Car2 file in the same way.
When you start SimDash, it will always remember the last configuration. if you want to use the settings for Car1, use the menu "File->Import Settings..." and load the file Car1 you had created on the desktop.
now you have the settings for car1 loaded and Simdash will keep remembering them until you import a different settings file.
Let me know if anything is not clear.
Cristiano