To get the most out of your 64-bit installation, performance tuning is essential. If things feel sluggish, experts at Adobe Community often recommend a clean preferences reset. Lightroom 5.2 to 5.7 difference, important?
Re-tuned to be more consistent across different image sizes and sets. Adobe Photoshop Lightroom 5.2 Final -64 Bit- -ChingLiu- --
Lightroom 5.2 was a significant "dot release" that introduced several tool refinements: Computer Darkroom Spot Healing Tool Refinements: Feather slider To get the most out of your 64-bit