Nope, sorry, both of your ideas for solving this are not possible with the current Version of Kurviger.
For more information: We talk about splitting routes into several parts here (and I think in several other threads as well, at least a little bit). You’ll be forced to make two routes (two .kurviger/.gpx files) but look around the forum a bit, lots of people already do that and they have some nice tips for it (like collecting all “sections” for a day in a Google doc, or a specific folder on their smartphone)