Translations:Scripted objects migration/80/en

Like in Addendum A, we can write the new class to create properties only if they aren't already present. Using method 3, we save the values of the older properties, and subsequently delete the older properties. However, if the new properties are named the same as the older ones, we don't need to delete the older ones, we can just reuse the same property, as we know the property won't be duplicated. If we are using Addendum B, we have a way to query the version as well.