Problems with editor

[jrburger95]

Hay I am having problems with the editor.

1. In my thing asphalt shows up invisible in the editor but shows up ingame
2. When I place a vehicle on the path at the end of it they despawn but don't respawn at the begining like in the video
3. Random crashes with the editor causing me to lose all my hard work
4. Trying to delete vehicle paths crashes the editor

Please tell me what I am doing wrong or what is wrong