simple answer, No.
I've used O
as an GPX Editor quite a lot..
-I export the whole mess first as a backup (...say, it's lots of mutilated garbage from other apps resharpened in GPS
Babel etc.) and then, I delete the mess down to a Pertinent Package and ExportAll That with a Pretty Name.
Next, Delete All, and import
that backup Mess. Edit it again into another
package etc. etc.....nowadays, your problem doesn't come up so much because I usually keep her RouteManager strictly confined to a trip so I can export the works as a Pertinent group. Other OVERALL or Already Packaged stuff gets loaded as a layer....
And there's a lot to be said for exporting Marks or routes as Singles. or, ( off the wall? how about this? as another Manual idea...) make a route
out of your favourite Marks and edit the gpx later as text, to make them into just marks again. IE:using a Replace Text With function in NotePad++