I thought you knew the path as you checked the dates. Anyway, if that is the path then it's a version of Confluence you've installed that has superseded the built-in version. Delete that folder.
Texture Cache Maintenance Utility: Preload your texture cache for optimal UI performance. Remotely manage media libraries. Purge unused artwork to free up space. Find missing media. Configurable QA check to highlight metadata issues. Aid in diagnosis of library and cache related problems.
