Sounds like you chose the Sepia filter in Predefined filters.
You are on the right track.
Place the image into the queue, and enter the batch screen (which you did), and click the SEL CLR tab (which you did)  and click the X to set all colors to default.
The pop up box appears showing your image as normal.  Click OK on the pop up box.
Now the entire image is normal again.
Click DONE in the batch screen and the removal of the filter is accomplished, after you click OK to save the filter.

The sepia filter is already made for you in a menu on the right mouse button

An easier way to delete the sepia filter or any filter, is to Right Mouse click the thumbnail and click delete Associated filter.
A box comes up and you check what you want deleted, or all deleted.

Fred

There's always a lot of "wind" on the forum. 
Thanks Jeff

Jeff, assuming you are still referring to removing the sepia tone, I have attached three snaps to help.

Snap 14 is showing SEL CLR with sepia turned on.
You click the X to reset to all back to default. Snap 15 shows the pop up box (still in the batch screen) that shows you the change before you apply it. You can see that the girl's face is normal, so you click OK!!!!!!
That applies the SEL color defaults back to normal and all colors are back to normal.
Click DONE in the batch screen and a box opens that asks if you want to save the filter change. Say OK, and you get snap 16.

Let me know Jeff.

Fred

That's the G for Global filter. If you checked Sepia in there, every image would have come out sepia.
Everyone was swimming in the muddy river.   

Anytime
Fred