I've read up and I know that many people recommend using other software to import .stl files. However, all I need from the .stl is something simple. I want to convert it into one solid body so that I can do small edits to it. Specifically, I wanted to edit the .stl files from this link in thingiverse: https://www.thingiverse.com/thing:275230 and make the stalks longer.
Could someone tell me the easiest way to achieve that? Thanks in advance!