MXFixer requires a license file to run. On starting MXFixer, if it is not licensed, a dialog will open with the MAC address. This MAC address is required to create a license for MXFixer.
Send this address to support@metaglue.com and a license file will be sent to you. This file should be placed in C:\Program Files\Common Files\Metaglue\Licenses, the .lic extension must be retained.
If you have no files open in MXFixer, there will be an option on the file menu to install a license. Using this option will correctly install the license.
The license file allows permission to run any version to run that was built before the end of your maintenance period. These versions will run forever, but if you do not continue maintenance you will not be able to install later versions or utilize the new features in later builds.