Delete the folder C:\ProgramData\Autodesk\CLM\LGS. This should force Inventor and other Autodesk products to ask what licensing you are using next time it opens. Once restarted you select network license and repoint to your license server.
Author
Chris Atherton
Managing the UK's Product Design & Lifecycle consulting service team, Chris oversees the development and implementation of detailed IT and engineering solutions for clients using Autodesk & Symetri products, outsourced solutions, or proprietary tools/techniques.
Chris has a proven track record for delivering results that come from auditing businesses and management processes, working with key stakeholders, defining client needs, developing proposals and plans to meet those needs, as well as overseeing the implementation of the complete project solution.