While current versions of QuarkXPress (2022 and later) can natively open documents from version 7 onwards, they cannot directly open files from versions 3 through 6. The converter's primary role is to:
It acts as a universal translator. It takes legacy files and updates their internal structure. quarkxpress document converter verified
Opening an old file directly triggers an "unsupported file format" error. While current versions of QuarkXPress (2022 and later)
Because it is an official tool from Quark Software, Inc., it maintains the layout integrity and metadata of your original files better than third-party alternatives. quarkxpress document converter verified
What are you planning to upgrade them to?