Render Using Lightroom

Hi there, 

Today I used Lightroom. As always, I start editing in LR and then use Edit in... Photoshop with a right mouse click.
Today I received a pop-up saying:
"" This version of Lightroom may require the Photoshop Camera Raw plug-in version ** for full compatibility. Please update the Camera Raw plug-in using the update tool available in the Photoshop help menu.""

Normally I check the Camera Raw plugin, Click don't show again and click open Anyway. This time I checked the box Don't show again and then I accidently clicked Render Using Lightroom.
Now all the pictures take much longer time to open and the system automatically makes a .psd copy on my hard drive, which is totally unnecessary. 
Can anyone please tell me how to undo this! I just want the DNG to open as a PSD in photoshop. That is already aranged in the preferences, so that is not the problem. But I don't want the extension -edited or an extra automatic .psd copy of the file. 
Please help me out!