Hoping you haven't unistalled OD 1.9 ...
you can save the Icons layout you are using closing OD2 and saving the "current theme" on OD 1.9 (as usual how many you want ) this way you can load a previous theme, in the end open again OD2 and apply the background !
Thank you Thank you Thank you. I purchased OD2 but because I couldn't find a way to run the zillion themes I have I went back to 1.9. I didn't think you could have 1.9 and 2 installed at the same time. It never dawned on me that I could use my themes as you stated. I tried it and it works! 
