Frozen scene when starting

Hi, im using unity 5.3.0f4 and have a problem when i start my game in unity, cause the scene is frozen on start. Its completly frozen, i know this because i have alot off trees and grass and the player is frozen. I can see that trees are not blowing in the wind.

I have been using a asset called FPS constructor, i beleave its still in the asset store for free. But now i have made my own fps player i want to use, So i want to remove the old one and replace it with my own.
I remember back when i got the fps constructor, i had to do many changes in the project settings, and always have a game object called “manager” in every scene, if not the game would be frozen.

I tried to delete in a backup version, first everything related to fps constructor and then everything in the project except the new player and the terrain. But still its frozen and will not start… The player works fine in a clean different project. Any ideas what i can do or what may cause this?

I spent alot of time on that particular level and i want to use it in my game, unless its possible to export a terrain from unity and then import to a new project?

Would appreciate some help with this, thanks!

At what point did your game begin to start freezing up at the start? I know I’ve had this issue in the past when working with very large environments. Does the game run fine after a bit? Could be a number of issues

it started after i began to use the fps constructor,so im not sure, but i think its one or more of the scripts fault from that particular package. Even after i deleted everything related to that asset. I still got that problem. After i press play, not sure if i should call it freeze or paused. Normally you can press play button and then the scene starts, but not in this case. time stops, and i cant resume the scene. If i exit play mode, im back in the editor and everything seems to be working fine there. Any suggestions might help solve this