The only other thing I can think of is to reinstall maestro and run it as administrator, though that makes no sense to me since I don't have to do that.
I would also do a windows update from the control panel as well, just to make sure you got everything you need updated. Keep in mind, that may take a while for it to download all the updates you should have, unless its already been done.
Last but not least, you might contact Digero and see if he has any ideas. I know you can contact him from the download site.