I'm pretty sure I've configured it correctly.Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator at firstname.lastname@example.org to inform them of the time this error occurred, and the actions you performed just before this error.
More information about this error may be available in the server error log.
Thats a tough one. I haven't quite figured out a good way to have a scheduling system for this addon. So right now, it uses the XF2 cron-job system... You need to turn your forum into debug mode and edit the cron job directly in the tools menu.
No we were never able to fix it. Its been uninstalled and we moved on to a different way to back up the website & database. With your comment, I can definitely say that support is lacking on this.I'm here. Just very busy... And hoping you manage to fix the problems yourself.