I had this happen. What i did was click on the outdated your first being "BRSG_social_forum_tools" copy all the text and paste it in like Microsoft Word, Note Pad any text software you use on your computer. Then hit revert changes i believe (you want to bring the file back to its original). Then revert and save it. Once that is done search for the file again "BRSG_social_forum_tools" and paste the old text into it and save.
Do this to all the files! Hope this helps. Let me know if i didn't explain it well.
If you edit it and it stills says its out of date, then what @Russ said was correct: you're using a style that is based on a newer version of XenForo (or some add-on). I'd recommend updating XF/the add-on and then re-editing if necessary.