The plugin author REALLY REALLY needs to address this memory problem. It consumes abnormal amounts of memory for just a few hundred URL:s.
The solution is NOT to increase PHP memory to 96 or 128 MB; 64 MB is sufficient in the extreme for everything else, but apparently not for a plugin whose only task is to write out a few URL:s…
Turning this plugin off for now. Believe it or not, memory isn’t an endless resource.