Same issue for me also.
I installed the plugin on a recent install of WordPress 3.3.1, made some changes and clicked ‘update options’, which had the correct result. However when I went back into the plugin the changes were no longer there – all checkboxes were empty again.
The settings do seem to be sticking, but not only do I not know what they are, I can’t undo any of them either, which is no use at all.
Any chance of a fix here?
Thanks,
Brian