I don't know how you got the actual nebula to show up, as I can't get it to show on my version of Stellarium (which admittedly hasn't been updated in a while), but if you go into "sky and viewing options", then "DSO", you may need to tick all the catalogue boxes to display the name. Also unclick the "limit magnitude" box, and make sure all the DSO boxes are clicked on under "filter by type". Pull the "labels" tab under "labels and markers" all the way to the right, which should bring up the name. Unclick "use designations for screen names" - doing this will bring up its common name rather than the catalogue number, making it easier to find well known objects. FYI, it's Lower's Nebula - SH 2-261 or LBN 863. Apologies if you've already tried all this.
