When you install MLWorks, it prompts you to input your license name and code. The following is example output from MLWorks:
Input your license name: MLPRO-WNT-I7TKQ@% Input your license code: C9F6@@6@436HW8Z
Note: Please reproduce the license name and code exactly as supplied. Preserve the case of alphabetical characters and do not introduce any extra whitespace (including leading and trailing space). To reduce the likelihood of error the license code does not use the digits 0 and 1, and all letters are upper-case.
Also note the following:
MLWorks stores valid license information in your home directory in the registry, under HKEY_LOCAL_MACHINE. MLWorks reads the license name and code from there in subsequent sessions, so you do not need to type them in again.
If you delete this stored license information, you will have to reinstall MLWorks in order to re-enter license information.