In MobaXterm, there is a "Custom Sessions" node that contains all the same items as my bookmarked "User Sessions":
It's annoying, but there doesn't seem to be any way to delete the Custom Sessions node.
Does anyone know how to get rid of it?
Look for the file Custom.mxtpro, it should be in your MobaXterm install directory. It's a zip file, containing (among others) a file named Custom.bookmarks.ini . Delete this ini file from Custom.mxtpro, and the "Custom Sessions" node will be gone.