Can't build, openvr_api.dll already exists.

This is driving me a bit crazy… upgrade from 5.3 to 5.4.16 today, and it refuses to kick out a build:
“Error building Player: IOException: Temp\StagingArea\Data\Plugins\openvr_api.dll already exists”

But i have only one of these DLL’s in the entire project, I even deleted the x86 version just to be sure, and restarted Unity. So I have no idea what’s going on here… help!?

Bump.

Delete both of the versions that come with the plugin, since they’re built-in with Unity for 5.4.

Thanks Rog, that did the trick. I tried that at the beginning and got a slew of errors, but I think I accidentaly deleted all the SteamVR scripts, not just the plugins.