What the built-in BFS Cache Purge plugin does — and how to restore it if it's removed.
Every BuildFormStudio forum is served behind a high-speed page cache, so guests get pages instantly without waiting on PHP. To keep those cached pages fresh, your forum ships with one small managed plugin — BFS Cache Purge (inc/plugins/bfscache.php) — that clears the relevant cached pages the moment someone posts, replies or edits. It's pre-installed and active, so there's nothing to set up.
It's fully yours to inspect. The plugin is a short, commented PHP file in your own forum's files — open inc/plugins/bfscache.php in the File manager or over SFTP and you can read exactly what it does. It only deletes cache files when content changes; it never touches posts, members or settings.
Deleting the file won't break your forum — you'd just lose instant cache refresh on new posts (cached pages still refresh on their own within about 30 seconds). To restore it:
inc/plugins/ using the File manager or SFTP.Configuration → Plugins in your Admin CP and click Activate on BFS Cache Purge.Configuration → Plugins in the Admin CP — that's the clean way to disable it, and it leaves the file in place so you can switch it back on anytime.