Stuck with ExoDOS theme

[deadfraggle]

I installed eXoDos with a partial list of games. Before merging it with my existing collection, I ran the copy of LaunchBox that was provided with eXoDos (just to check it out.) After closing that copy, I followed the instructions for merging the eXoDos collection into my main collection. Everything went fine, except now LaunchBox has a grey riveted background instead of the default background theme (that changes depending on what game is selected). Changing the background in LaunchBox options is not available in my free version.

I didn't move any files from the main directory, just the sub-folders mentioned in the eXoDos manual. Since Launchbox is portable, I thought running a different copy of the program wouldn't affect my main installation. Apparently, I was wrong.  How can I restore it?