I want to know which config file that can edit target the license for CoCreate Model Manager version 17.00?
The License Server, as well as Database Server and File Server, are configured in the XML file you are using.
As a quick test, you can make a copy of your XML file located beneath %APPDATA%
The right solution is to edit the XML file on the Server (where your Database Server is running)
Hope this helps.
Did you have a Chance to verify the solution?
I am 100% sure that my answer is correct since the task you describe is daily business for a Consultant.