Please download the latest version v2.4.1 of Gen 2 Energi Core Wallet available per target operating systems.
Energi Core Wallet v2.4.x has a new feature to migrate Gen 2 NRG coins to Gen 3 coins
Please verify downloads with the above PGP signatures to ensure you are receiving official Energi builds. The correct public key has the ID 0xDB1DA83F or 0xE45021593BD488EB. The keys are also available on public key servers, for example the Ubuntu Key Server