The plugin is working fine on the front side but I end up in an endless loop on the admin side if I attempt to edit the settings of a widget. I noticed this after upgrading to version 1.5.4.
I tried upgrading to 188.8.131.52 and downgrading to 1.5.3 and get the same results. The site is large. I increased the number of pages (it reports 139 but there are custom post types with hierarchy as well which take that substantially beyond the 500).
I've made a donation. I'll be thankful for any direction you can give me.