Either delete that specific asset in content manager, apply 'delete missing assets' to the route, then reinstall the content, or, in Surveyor 2.0, filter only by selection, use the marquee tool to highlight a region, then delete those splines
Either delete that specific asset in content manager, apply 'delete missing assets' to the route, then reinstall the content, or, in Surveyor 2.0, filter only by selection, use the marquee tool to highlight a region, then delete those splines
I disable (hide) the assets, use the delete missing assets to bulk delete from the route then go back and enable (unhide) the assets again. You need to exit from the route in order for the hide and unhide function to take effect.