[Plugin: article2pdf] Doubling slashes

The pdf part of the plugin works like a charm. But, I am having a problem with the administrative part. Each time I update the settings, the backslashes in the paths to the templates, cache, and tempcache folders are doubled. And, then doubled again, and so on until it crashes after about five doublings. I have traced the operation and the doubling seems to be happening in the set options or update_options section. Help.