Did you end up doing it yourself?  I was advised by QB IT dept, this is what they said.

By the way, regarding with condensing the file, the IT and you are not allowed to do it why? because there was some instance that the customer also condense the file and it was all damage and she wasn't able to use the file anymore. The only person that can help you reduce your file is the Enterprise person or department. They advised me to subscribe atleast 1 month so that they can create a period copy of your file (that's reducing of the file) and then, you cannot continue using your file while condensing it to avoid data damage. Once the file was reduced, they can return your company file to your Quickbooks Pro Plus.