Garrysmod acting up. HELP

ive played garrysmod for 2 years now, and i just reinstalled it, now everything but the map is being pulled to the center of the screen and looks stretched out. in GM construct all the buildings are shades of green. it sucks! i have a picture, but i dont know how to post it.

Use image tags to post the image [img]imagelocation[/img ]<—without that space

C:\Users\Owner\Pictures\help.jpg

Upload it to an imagehosting site such as www.imageshack.us