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(released in 2011). Starting with Lightroom 4, a 64-bit OS became a requirement. Security Risks
You may find downloads labeled as "Lightroom Portable," but it is important to know that of Lightroom.
LightroomPortable/ ├── App/ │ ├── Lightroom.exe (32-bit) │ ├── Lightroom5.dll │ ├── Plugins/ │ ├── Presets/ │ └── Resources/ ├── Data/ │ ├── Settings/ │ └── Catalog/ ├── LightroomPortable.exe (launcher) └── Registry.reg (simulated registry keys)