I wasn’t sure. Cuttle is currently free, and may have a fee in the future. But I think they have made it clear if you share a project than it will be free to use.
I guess if I posted a file that I created in Illustrator (which is not free), technically the file is free to use.
So interesting design/Cuttle thing - it looks like your tab parameters is hard coded so when (for example) I switched this to 10x15 inches, the slots became a single 10" slot - they didn’t switch to their Imperial equivalent from the 10mm.
Not sure if that’s a parametric thing, or a Cuttle thing - but in case you do I’m letting you know
Nikolett did a great job writing up my hinge box generator. Actually the article is about Cuttle, I was just thrilled that someone used my file and it worked.