Comment désactiver sur mon vieux Pc et réactiver Lightroom sur le nouveau
Montaigne, there is no deactivation for Lightroom. You can have one copies of both versions on each computer. That is Lr3.6 and Lr4 on each computer. Lightroom is unlike Photoshop which does require deactivation.
If you want to remove any instance of Lightroom just uninstall or delete the version you don't need.
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