Blox is a puzzle game made with DS Game Maker. This release opens level creation to all users but only "pro" users will be able to load user-created levels. The cost of a "pro" license is approximately $0.14 USD.
The "pro" license is to unlock expanded functionality of this Homebrew. The license HAS NOTHING to do with DSGM, buying DSGM, using DSGM, coding with DSGM, or what Operating System you use. Again, you would be paying for a code which unlocks more features inside of the Homebrew and nothing more!