We found a solution for this problem. In order to allow uploading files larger than 8 MB, you should update the
Web.config file, located at C:\inetpub\wwwroot\MySemanticSearch\MySemanticSearch. In that file, add the highlighted line below.
Once saved, close the file, and open MySemanticSearch. Now you should be able to upload files up to 50 MB in size.
You can solve this issue right away using this method. We'll upload a new version of the application shortly with this fix.