Turnbased can't build on Unity

The error is: Plugin 'Photon3Unity3D.dll' is used from several locations.
I've searched for solutions but nothing seems to work for me.
I just need to build for Windows. Theres a plugin on PhotonAssets/Plugins, PhotonAssets/Plugins/Metro, PhotonAssets/Plugins/WP8 and PhotonAssets-US/Plugins.
What should I do?