Error during rendering

Hey guys, everytime I try to render in any engine, a pop up tells me that there's been an error during rendering. If I try to render again, i get "renderer already in use". It's frustrating. I even uninstalled Daz Studio completely by deleting all the program files and re-installing. It still doesn't work. I was running Daz 4.9 and it hasn't changed, even in 4.10.
Comments
Iray or 3Delight? Or does it do ith with either? If you go to Help>Troubleshooting>View Log File after a failed render and scroll right to the end, what are the last lines (from the beginning of render-related messages)?