Nope. Tried it, no worky. cleared cache in server and browser.
I will suggest the below steps.
first uninstall the simple messenger module.
Delete the simple messenger module folder from your module/boonex/ folder.
Download the full 7.0.1 version not only the patch for 7.0.1. Try reuploading ONLY the simple messenger folder from the full 7.0.1 to module/boonex/
re-install simple messenger module.
Go to Manage Membership Levels Actions menu under setting. of membership level. Disable and enable again all the option including to use simple messenger for all membership level including Admin. Cleared all your cache.
If it does not work PM me your site url and admin account on it. I can give a try.
Another Day past.............................