=Access to and use of this software is strictly limited to registered users only. Any unauthorized use or access is prohibited
=The use of this software is strictly limited to registered users only.

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What are alternative ways to say "The use of this software is strictly limited to registered users only."?
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Usage of this software is reserved for individuals with valid registration.
Only users with a registered account are authorized to use this software.
This software may only be accessed and used by those who have registered.
Registration is required for all users of this software.
The software is accessible solely to users who have completed the registration process.
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