I even checked to see if it was the correct folder; and it was.
How did you check? When the new Blockland launcher came about the main Blockland folder was moved from program files to documents. But when Blockland updates and moves the folder, it doesn't delete the old folder. If people didn't read the update news they might not notice and their add-ons wouldn't work. This is why people are asking about it a lot.
I meant to say that I went into my Documents, found the add-on folder and I opened it up and then saw all the default add-ons there so I knew it was the right one.
Did you see RTB in that add-ons folder?
You know how to upload an avatar but not how to place a file in a folder?
Is RTB in a zipped folder? Can you install and use other add-ons successfully?
I think it is zipped, and no I cannot.