few tips Jamie:
when dragging the line, wait a few seconds for the broad purple translucent line to match the route you want to achieve, before letting go of the mouse. You have to be slightly patient with this while holding the left button down, especially if you have a slow network connection and/or are using the optimum/shortest routing methods.
'Undo' is now at the bottom of the 'edit menu'. It restores the track to how it was before you did the last operation. There is no 'Undo Last' as that was confusing people as it wasn't a proper undo, it merely removed the last segment of the track.
If you're still struggling try and isolate a specific workflow, a few steps of operation illustrating why you can't get it to do what you want and I'll see if anything can be improved.
Also , what system are you using?
- mac? If so remember gpxeditor relies on there being a difference between left and right mouse click so it could be that that's spannering you.
- mobile? I've removed reroute from the mobile functionality as it was too difficult to determine a swipe between reroute and pan, and most attempted pan operations were resulting in (unintended) reroutes. It may be incorrectly determining that you are on a mobile device if you have a touch screen monitor and drag-to-reroute doesn't work at all - if this is the case let me know and I should be able to come up with a workaround.
Would be interested to know if anybody who has a touch screen monitor is able to reroute using the mouse.