Hi Mirko - It seems to be working OK for me here, so it may be just a problem for certain settings. Can you let me know what settings you are using please and where you have placed points A and B and I'll see if I can recreate the problem?
John
Plotaroute was working nicely for me in the past. For a few days now it does not work anymore. Making an A to B route takes forever. Just now I am stuck at 71 % for about 10 minutes. I don't think it will finish calculating at all.
I am using Safari 8.0.5 on Mac OS 10.10.3.