Now this is mostly a tip to new users as every day there are newcomers i have never seen someone write this maybe because for more this is common sense.
Now sometime your perfect path need a bit of tweak like a GY path or a Vendor path making a infinite loop.Well there is no Path editor or a program like that.
However if you noticed every path is XML file, so you can just open it with notepad find GY path or vendor path and just del them.It is easy to spot where GY path begins it has <nodesDeath count="82"> and </nodesDeath> remove them with all that is between them.
Same thing for Vendor path.
I think a fine tuning can be done too by just removing a line of coordinates-removing a spot.Don't forget to fix <nodesDeath count="82"> to one less than 82 if you are removing 1 spot. I have not tested fine tuning but see no reason not to work.
Well that is all hope it helps abit all newcomers.