Quicksilver Renderer Disappeared

[Anonymous]

I have been trying out different renderers in 3DS Max and wanted to use the Quicksilver Renderer. I was able to have it work perfectly fine in the file with lights and cameras but suddenly the option in the Render Settings is gone. I can only choose from Arnold, Scanline, or ART, but I want Quicksilver. When I open a new scene with nothing in it I have the option to choose Quicksilver but not in the file with all my models and animation. I haven't made any modifications to anything in the scene so I don't understand why it suddenly won't show up. 

Thank you.

[BenBisares]

I would check in the Plug-in Manager (Customize menu) if you even see the Quicksilver plug-in, if yes is it loaded?

[Anonymous]

I actually was able to figure it out. Somehow I accidentally switched the Target in the Render Setup from Production Rendering Mode to ActiveShade Mode. Switched it back and Quicksilver came back up.