Updating DWCS6 Older Extensions with Current Extensions

I have a number of websites built with DWCS6 using older DMX extensions. You say that I can now interchangeably import DW sites directly into Wappler v1.0.2 if they use the newer extensions. How would I go about determining which extensions need to be replaced so the site will open in 1.0.2?

Once I know which extensions need to be replaced, do I then simply use DMXzone Extension Manager to update the DWCS6 sites? Will the webpages using the older versions be automatically updated or must I manually update each relevant page?