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Does Update diff or replace files

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I'm in the process of looking for a new installer/updater for my application. Excelsior looks very user friendly. I had been using Wise Installer Studio with SmartPatch.

My application has several large archive files, 300-500 mb. Wise will no longer diff files this large and crashes.

My question is:

Will Excelsior create diff files for these archives or will it simply replace the files completely?

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Excelsior Installer and Delivery create updates using the file replacement mechanism.

Of course, the binary delta technique is more preferable for updates. It is one of the priority features that should be done in our installers.

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