static void cleanupOldPresaveFiles(File root) {
		Thread t = new Thread(new CleanupRunnable(root), "Database-Item-Cleanup");
		t.start();
	}
@see ghidra.framework.store.FolderItem#canRecover()
Ghidra/Framework/FileSystem/src/main/java/ghidra/framework/store/local/LocalDatabaseItem.java