It is over the limit number of machines on your license
Assuming a case where users of licenses use computers at work and at home, this software allows the same user to register licenses on multiple computers (up to three).
Delete your old computers
If you change the computer you use such as purchasing a new computer, you can not register the license because 'Over the limit machines on your license' is displayed at license registration.
Then you can delete old your computers on 'Computer management page'.
Computer management page web site URL format is,
Refer to the product help document for the correct URL of the computer management page.