While it may seem like a "bug fix" release, version 11.5 introduced several quality-of-life enhancements for serious workflows: Expanded Filmstrip Filters:
On a Thursday she opened a photo of the magazine’s founder, an old man who had once donated a column to the paper. The Memory slider brought him back to youth—vigorous, persuasive. The Home slider softened his jaw into compassion. In the corner, metadata read: Will you forgive me? She had no authority to change this man’s past. Yet when the founder’s obituary ran a week later, the family included a note thanking the magazine for its gentle portrait. Mara stared at the screen until dawn. adobelightroomclassic115dmg
It seems you’re looking for a guide related to and a file named 115.dmg . A few things to clarify first: While it may seem like a "bug fix" release, version 11