Updating from 3.5 > 4

I already have Dorico 3.5 and all the HALion content installed.
I also have a dedicated HSO key, HALion 6, GA5, etc.

My products points to a full installation with a huge 10gig content file to download.

I notice there is also a Dorico Pro 4 “Update” icon if I expand the Dorico tab in Download Assistant. All told it is under 2gig worth of stuff, the content section being only 437.69MB.

Which one do I need? Can I just grab the much smaller stuff under the ‘update’ tab, or do I need to grab the larger one?

Do the Update one. The only sound sample changes are with the Olympic Choir sounds. So, the update will only install those updated samples.