Unfortunately not. You might be able to edit the output file to force it to become continuous, but you have very little control over how the export is generated. If there are circles, ellipses, or lines in the string, they will become this "primitive" in the definition.
Creo has no use for this capability since you have several ways to select contiguous strings. I suspect PTC lets you rely on other systems to be able to do the same once the feature is imported.