So far I have not had any problems by opening it up in a text editor and changing the r number. Works fine on my side, but I did not do many changes to the file when I was working with it in r98.
How often do new beta's get finalized?
@Wicstar, did you open it up in notepad (PC)?
Should be towards the top(8th line down on my side), look something like: <saved-with-version>9800</saved-with-version>
Just change that 8 to a 5 ;)