I'm glad you solved it.
Just for being more precise, the add-ons do not have licenses, but they are just limited in download amounts (the current limitations sets you could download them for 10 times each, which would mean they should be enough for a lifetime). You are free to download them as soon as this amount exhausts.
Please note that currently, if you use the Compiler
with the add-ons you've purchased, the download amount is not decreased. Not sure if we change it in the future, but that's the current bonus of the Compiler.
Enjoy using miniBB :-)