If you get the message that your recycle bin is full, you need to clean up the Recycle Bin of the quilt library. The Recycle Bin is always the last catalog of the library. Go to Utilities > Library Maintenance, select Quilt Library and Cleanup. Find the Recycle Bin using the down arrow on the left. Open it and select and delete the unwanted quilts.
The "Recycle Bin full" message will pop up when 20 quilts accumulate in the bin.
You can select and delete individual files within the Recycle bin, or select and delete the entire Recycle bin catalog. The Recycle bin will reappear the next time there is a quilt to go in it.