From one version to another

So, i just installed unreal 4.15 and i installed every plugin the ue 4.14 had (except procedural mini which is incompatible) and then i copied a project and reverted it from 4.14 to 4.15 without problems. In 4.14 i was “playing” at Epic settings with 60 frames and up. Now with 4.15 i can play with about 30 frames and lower. also, my picture looks like i have maxed out the depth of field in post processing when i only have a bokeh DoF. What can i do to resolve this?

EDIT:
So, i restarted the project and the blur with the Depth of Field has gone. Also i can now play at normal levels when everything is at max EXCEPT FOLIAGE. When Foliage is higher than Low Setting My fps from 120 go to 3-5.
Computer Specs:
GPU:GTX 1060 6GB SC
CPU: Core i7 6700k
Ram: 16GB FuryX
MoBo: Asus Maximus VIII Hero
Note: Nothing is overclocked