|OK, since it was brought up again, and it was a pretty obvious deficiency, new version 0.11 adds some basic editing tools.|
First, the line tool has a "Delete Last Segment" button to allow you to undo things if you misclick or whatever. Pretty simple.
Second, there is a "Edit Layer" button added to the main draw tools screen (assuming the layer has something in it to edit, if not the button is hidden). Clicking on it will put you into object select mode where you can cycle through all of the things you've drawn on THE CURRENT LAYER (make sure you have the right one selected when you select "Edit Layer"). As you cycle through, only one object is shown at a time so you know which one you are selecting. When you find the right one, click edit.
From there the behavior is the same as if you had just added the object (which is essentially how the code works too). If you click on the map it will move the object (or add a new line segment from the end of the old one if using the line tool), you can edit all the parameters, colors, etc. Be aware there is no undo once you start editing, maybe I'll add one if it seems a big deal. Make sure you save the changes you make, or even if you don't make changes click save if you want to keep the object. If you click the other navigation buttons (starmap, dashboard, etc) the item will be deleted entirely. The delete button will also do this obviously.
This update should be fully compatible with any drawings you've already made, so everything should be editable. Let me know if there are issues.
And speaking of which, Nakor did you ever get this working? If not, send me a pm, there's a couple things I want you to try. Sorry, I kind of left you hanging there.