I am using the DxO OpticsPro 11.4.2 Essential.
Never had this issue before, only started today. Can’t seem to export any images at the moment.
Select Export >> (Export to Disk - Options appears) >> can’t select the left panel Jpeg tick box. therefore the bottom right export is greyed out. Please help.
Very similar to this issue. no solution posted though.
James
I‘d try with a new output format (create a duplicate) and see if that changes anything. Then I‘d try to reinstall and last but not least, see if OP 11is still supported to run on your current os at all.
Hello @tsengj,
About all the issue connected to OP11 and earlier versions you should write directly to Support - https://support.dxo.com/hc/en-us
But you can try to reinstall OP11 as suggested by @platypus. And I would try one more - (when you uninstall the app, rename/move the following folder: %LocalAppData%\Local\DxO_Labs\ ) then install the app.
Regards,
Svetlana G.
I have and am communicating with the support.dxo.com team. waiting for their 2nd reply.
@platypus, I have uninstalled it, and have removed the suggested folder above. In fact, i have removed both %programfiles% and %appdata% too. to no avail (as recommended below). Only thing left to try is to clean out the registry, which is the last resort.
https://www.auslogics.com/en/articles/how-to-remove-software-leftovers/
I have successfully uninstalled, and cleaned my registry, and reinstalled. the application now works! Whew!. thank you all!
You are welcome 
Closing the post.