Grasshopper: Reusable Wood Cross Joint

I COULD NOT OPEN THE FILE

The file I bought has a .gh extension, I cannot use it, I need it in .stl. I wrote twice and never got a response. very bad customer service I hope this time they give me a solution

grasshopper

very messy script yet very insightful, learned some new tips, would appreciate a lot, if you could add some description in your script or group them