You need all of them! Then you should import one after the other into the mega. However, the updates are for mega 2023! First you should therefore download the mega 2023 as a basis for the update import.
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svdl only audio, no pw
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However, beware: Hint Syzygy Bugy in both updates:
If you use Syzgy everything works correctly with version 10 of Fritz 18, as well as with CB 16 version 18 and CB 17 version 11.
You need all of them! Then you should import one after the other into the mega. However, the updates are for mega 2023! First you should therefore download the mega 2023 as a basis for the update import.