Possibility to use multiple shell32.dll?

I recently installed a theme that made me change files such as shell32.dll and explorer.dll. Unfortunately, the theme is now messing with things such as Microsoft Word (Page colour is always grey instead of white -.- ) and a calender organization software. I'll show a picture of what I mean:

Other than this, everything seems to look good, but this program doesn't have themes you can change. So basically is there a chance I can use an original shell32.dll files for example and have this organizer program use those files, while everything else uses the custom shell32.dll? Or are there any other solutions anybody can think of? Hopefully this is in the best possible section... There were several areas I could have put it.

Thanks in advance anyways!

Still looking for an answer.