License for free plugin

I want to release my first audio plugin. However i don’t really want to open source it. The plugin will be freeware. What license do I need? Is the free one just fine`? (If i don’t get money from the product)

See Get JUCE - JUCE

If you release it as an individual person and your Annual Revenue/Funding from JUCE related products is less than $20000, you can choose the STARTER license (basically you don’t need to do anything).