Unable to unlock MDK community edition

I have downloaded MDK community edition. How to get product serial number and convert it in to license?
File unlocking

Hi all, can anyone tell me how to unlock the file which is with the lock symbol? Can't we edit that file? Thanks
File unlocking

Hi all, can anyone tell me how to unlock the file which is with the lock symbol? Can't we edit that file? Thanks
lock / unlock file

When I am using uVision 4.21 to check project source files. I found some files have a key on the file icon. It looks like the file is locked and user can not edit it. My question is: How to lock...
lock / unlock file

When I am using uVision 4.21 to check project source files. I found some files have a key on the file icon. It looks like the file is locked and user can not edit it. My question is: How to lock...