To get started we need a Points database in a .txt file & the address of the file to input during the SIM prompt. There are numerous website which provide airfoils database in coordinates, one of them is mentioned below.
Here's a link to an extensive database of airfoils from where the points can be copied into the .txt file for 2D SIM runs.
Scaling 0.1
Scaling 0.2
0 deg rotation
+10 deg rotation
-20 deg rotation
Offset [1.0, 0.6]
Offset [2.0, 0.7]