On your website I get a "Invalid contract provided." even though I have an active subscription.Regarding this error, may I know how you triggered this error? It's best if you can provide us the steps you did to encounter this error so we can try to replicate this ourselves.
On my Joomla website I get a "The MD5 hash of the downloaded file does not match.In order to investigate this, can you provide us your backend and ftp access at http://stackideas.com/dashboard/site ? This gives us the opportunity to directly troubleshoot the issue on your site.
It is currently a weekend from where we are at. Some answers may already be available on our documentation at http://stackideas.com/docs
Rest assured that we will get back to your posts as soon as the week starts!