No issues.  It just took me a little while to figure out how to add waypoints to the route.  That was somewhat challenging since I was just playing around with it from my phone.  I'll give it a go on the desktop machine and keep you updated on my progress/thoughts.  

Very interested in trying out the .gpx import/export feature too.  Thanks again for creating this--it's clearly a labor of love and I imagine a lot of hard work goes into developing such features.

oh yea. Years. From the phone it's a bit painful. I'm hoping to improve that quite a bit. I also just got KML import working so you should be able to export things from Google Maps or Earth and import them here. You can also do a bit of editing on tracks you upload. Right now it's just cutting out sections using the select/scissors tools (box icon on left when editing).