Do you have some advice what to do with embeded inst vars of
expects them to be bools while my 1.1 contains arrays, sometimes non empty.
You have to figure out how to move the contents into the right
variables using #instVarAt: and #instVarAt:put:. However, in your case
it is probably easier if you use SIXX -- or try to adapt the
import/export code to use SmartRefStream -- that both can handle
instance variable changes. Then you only need to fix the "new"