It built upon the major v1.4 update, which introduced input masking (letting artists choose exactly which parts of a layer glow using alpha or luma masks) and aspect ratio angles for anamorphic, cinematic looks.
By the time version was released, the plugin had become a staple for both Windows and Mac users. This specific update was a "polishing" chapter in its history:
It leveraged GPU acceleration to ensure that even complex, multi-layered "superbright" glows rendered in real-time, making it ideal for fast-paced HUDs and infographics. The Designer's Experience
It addressed critical technical hurdles, specifically fixing an issue for OSX Catalina users that had previously hindered Mac performance.