Moving Plugin Locations

If I move the locations of some plugins (and re-scan for plugins), will Ardour find the plugins in older sessions in which the plugin had a different location? And, more importantly, keep the settings for the plugin in that old session?

If not, is there a work around to keep the plugin settings?

Yes and yes. Plugins are identified by unique IDs, independent of the plugin’s location on disk.

Even if a plugin is not available when loading a session, Adour adds a “stub” in its place. the state is retained.